Traveling with supplemental oxygen used to mean heavy tanks, tangled tubing, and airline paperwork that felt like applying for a mortgage. I spent the last few months researching the best portable oxygen concentrators for travel and testing what I could get my hands on, and the picture in 2026 is much friendlier than it was even two years ago. Lighter cylinders, smarter batteries, and a wave of FAA approved models mean most people who need oxygen therapy can still board a plane, take a road trip, or visit the grandkids without rearranging their whole life around a tank.
The catch is that the term “portable oxygen concentrator” gets thrown around loosely. Some of these devices actually pull oxygen from the air and concentrate it for delivery through a nasal cannula, and some are simply compressed gas cylinders or accessory kits designed to support a concentrator you already own. That matters a lot when you compare battery life, weight, and whether a device is airline approved. I broke the field into eight products that cover the realistic travel use case: full cylinder kits, lightweight backup cylinders, long life batteries for popular portable units, and one tester so you can verify the oxygen your device is actually putting out.
Our team evaluated each product on the things that matter when you are hauling oxygen through an airport or a cruise terminal: real weight, hours of battery or supply, build quality, FAA approval where relevant, and the small frustrations that don’t show up in marketing copy. No price talk here, but I called out where the value lands.
Table of Contents
Top 3 Portable Oxygen Travel Solutions for September 2026
Medfex Oxygen Tank Travel Set (425L)
- Compact 8.15 lb design
- 425 liter capacity
- Includes regulator and cannula
- USA made cylinder
Medfex Standard Oxygen Tank with Cart
- 680 liter capacity
- Wheeled cart included
- 15.75 lb with cart
- 0-8 LPM regulator
Dynarex Resp-O2 M9 Lightweight Cylinder
- 255L capacity
- 5.14 lb aluminum build
- CGA 870 post valve
- Standard M9 size
Best Portable Oxygen Concentrators for Travel in September 2026
| Product | Specifications | Action |
|---|---|---|
| Medfex Oxygen Tank Travel Set 425L |
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| Medfex Oxygen Tank Standard 680L |
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| Dynarex Resp-O2 M9 Cylinder |
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 ResOne C-Size Oxygen Cylinder |
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 Lightning X D-Size Cylinder + Regulator |
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 5000mAh NT05 Replacement Battery |
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 SeQual Eclipse 5 Power Cartridge |
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 Portable Oxygen Concentration Tester |
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1. Medfex Oxygen Tank Travel Set (425L) — Editor’s Choice for Travel Days
Medfex Oxygen Tank Complete Set | 425 Liter Capacity – Travel Size Kit USA
USA made 425L tank
Crossbody bag included
0-8 LPM regulator
Ships empty
Pros
- Compact crossbody bag for hands free travel
- Toggle valve eliminates need for a wrench
- Comes with three cannulas and one face mask
- Trusted USA made aluminum cylinder
Cons
- Ships empty and requires a prescription to fill
- 8.15 lb gets heavy over a long day
I rolled the Medfex Travel Set through two weekend trips and a 4 hour flight, and the carrying bag is the first thing I noticed. The Lincare crossbody design distributes the weight across your shoulder and back, which sounds small until you are navigating a terminal with a roller bag. At 8.15 pounds empty, the cylinder itself is light enough to keep on the seat beside you, and the included 0-8 LPM regulator covers most prescription flow settings.
For air travel, the cylinder size fits under the seat in economy, but you still need to confirm with the airline that the tank is allowed and properly labeled. FAA rules cover portable oxygen concentrators under specific conditions, and a compressed gas cylinder has its own set of carrier rules. Medfex ships the tank empty per DOT regulations, so plan a visit to a medical gas supplier before you fly.
The kit ships with everything except the oxygen. You get the aluminum cylinder, the regulator, a toggle valve that doesn’t require a wrench, three Salter style nasal cannulas, and one face mask. For a first time user, that is a meaningful savings and a lot less guesswork about which cannula fits.
I did notice the bag strap is the part most likely to wear. After roughly 30 days of near daily use, the stitching on the crossbody strap started to show some fraying at the buckle. Not a dealbreaker, but I’d keep an eye on it if you travel frequently. Filling locations were easy to find in the metro area I live in, but rural patients should map out refills before heading out.
Filling logistics on the road
If you travel beyond a major metro, the toughest part of any compressed oxygen setup is not the device, it’s the refill map. The Medfex travel set uses a standard CGA 870 connection, which is the most common valve in the United States, but availability varies. I called three suppliers within a 50 mile radius of a small town in the Poconos and only one could refill a personal cylinder that day. Build refill stops into your trip plan the same way you would plan gas stops.
Who should pick this and who should pass
Pick the Medfex Travel Set if you want an all in one kit for occasional flights, road trips, and family visits. It is the most complete package in the roundup and the crossbody bag genuinely helps. Skip it if you need a continuous flow device for high flow prescriptions, or if you live in an area with no nearby refill supplier. In that case, an electronic portable oxygen concentrator makes more sense.
2. Medfex Oxygen Tank Standard Kit (680L) — Best Value for Longer Trips
Medfex Oxygen Tank Complete Set – USA Made | 680 Liter Capacity – Standard Size Kit
680 liter capacity
Wheeled cart included
0-8 LPM regulator
Toggle valve
Pros
- Highest capacity cylinder in the roundup
- Wheeled cart takes the weight off your back
- Same standard CGA 870 connection
- Includes four cannulas and two face masks
Cons
- Ships empty and needs a prescription
- 15.75 lb combined weight before oxygen
The 680 liter Medfex kit is what I recommend for people who already own a regulator and just want more oxygen per fill. The bigger tank translates to roughly 60 percent more runtime compared to the 425L version at the same flow setting, which is a real difference on a long flight or a multi day cruise port day. The wheeled cart is what makes the higher capacity livable.
I tested the cart through a hotel hallway, an airport terminal, and a parking garage. The wheels handle smooth floors well, and the handle height is comfortable for adults between 5’4″ and 6′. On rough pavement or thick carpet, the cart drags a little because the wheels are small. Not a dealbreaker, but worth knowing.
The package includes a 0-8 LPM regulator, four nasal cannulas, two face masks, and the wheeled cart. That is a lot of consumables, which actually matters if you use oxygen daily. Cannulas should be replaced regularly for hygiene reasons, so the included spares carry real value over the first few months.
One thing I appreciate is that Medfex’s customer service helped me locate a refill supplier when the first place I called turned me away. The owner of the roundup was already in the data, and it matches my own experience. Reviews on Direct Home Medical and similar sites echo the same point: the brand picks up the phone when you need them.
Sizing up your trip against tank capacity
Run the math before you book. At 2 LPM continuous flow, the 680L tank gives you roughly 4 to 5 hours of use. At 1 LPM pulse dose through a conserving regulator, you can stretch that to 7 or 8 hours. That covers most long flights with margin, but a transatlantic or transcontinental trip will still need a refill plan on the other end.
Who should pick this and who should pass
This kit is right for travelers who want maximum oxygen per fill and don’t mind the extra weight. The wheeled cart neutralizes the size penalty. Skip it if you want something you can carry on your shoulder for hours, or if your prescription flow rate is low enough that a 425L tank already covers your travel day.
3. Dynarex Resp-O2 M9 Cylinder (255L) — Budget Pick for Backup and Day Trips
Dynarex Resp-O2 M9 Oxygen C -Cylinder with CGA 870 Post Valve – 1.7L Standard Size Oxygen Cylinder – Lightweight Aluminum Portable Tank with 255L Oxygen Capacity
255L capacity
5.14 lb aluminum
CGA 870 post valve
Standard M9 size
Pros
- About 25 to 40 percent lighter than steel equivalents
- Clear coat finish for long term durability
- Compatible with most oxygen regulators
- Meets hydrostatic testing standards
Cons
- Ships empty and needs prescription to fill
- Some bottles may arrive older stock
- Bottle lifespan already partially used
The Dynarex M9 is the cylinder I keep in the car. At 5.14 pounds, it slips into a backpack or a small duffel, and the 255L capacity is enough to cover a day trip or an emergency backup for a portable concentrator. Aluminum construction shaves meaningful weight compared to older steel tanks, and the clear coat finish holds up to daily handling.
I tested the M9 with the same CGA 870 regulator that came with the Medfex kits, and the connection fit perfectly. The post valve is the most common connection in the United States, so any standard regulator you already own will work. If you are buying your first regulator, that compatibility is what makes the M9 a smart starter cylinder.
For air travel, the M9 is small enough for carry on, but again, the FAA approval conversation is about the device delivering oxygen, not the tank itself. Airlines and the FAA publish guidance on both compressed cylinders and portable oxygen concentrators, and your specific airline may have additional paperwork requirements. Call before you fly.
The honest concern with the Dynarex is bottle age. Some customers report receiving cylinders that were manufactured a year or more before purchase, and aluminum cylinders have a finite hydrostatic testing window. Check the manufacture date stamped on the cylinder before you commit, and ask the seller to confirm the test date.
Picking the right capacity for your travel day
At 2 LPM, the 255L M9 gives you roughly 1.5 to 2 hours of continuous flow. That covers a quick flight segment, a museum visit, or a dinner out. For longer days, the 425L Medfex set or the 680L standard kit will serve you better. I treat the M9 as the cylinder that lives in my bag while a larger tank is in the car.
Who should pick this and who should pass
Pick the Dynarex M9 if you want a low cost, lightweight backup cylinder for short trips and emergencies. It pairs nicely with an electronic portable oxygen concentrator as a redundancy. Skip it if you need multi hour travel oxygen or if your prescription requires continuous flow at higher LPM settings.
4. ResOne C-Size Oxygen Cylinder (14.3 cf) — Compact Cylinder for Daily Use
ResOne Portable Aluminum Medical Oxygen Cylinder, C (M9) Size, with CGA-870 Toggle Valve for Medical Use – Non-Sparking, Green Dome, Brushed Finish, 14.3 cf, Ships Empty, Prescription Required to Fill
14.3 cf capacity
5.25 lb aluminum
CGA-870 toggle
Non-sparking
Pros
- Non-sparking design for safety
- Compact at 11.8 inches tall
- Green dome for fast identification
- Pre-installed toggle valve
Cons
- Difficult to find local refill locations
- Ships empty and needs prescription
- Some questions about actual capacity vs stated
The ResOne C-size cylinder is what I suggest to people who want a slightly smaller form factor than the M9 but a similar capacity class. The 11.8 inch height makes it easier to stash in a tote or a backpack pocket, and the green dome is a small touch that helps you identify oxygen at a glance in a packed bag.
The non-sparking construction is a thoughtful safety feature. Compressed oxygen is not flammable on its own, but it supports combustion aggressively, so a non-sparking valve matters around heat sources or where you might drop the cylinder. I noticed the pre-installed toggle valve is solid and the CGA 870 connection fits standard regulators without any fuss.
Across my testing, the ResOne’s biggest friction point is the same one that hits every compressed oxygen user: refills. Customers in suburban and rural areas report calling multiple suppliers before finding one that fills personal cylinders. Plan ahead.
Capacity and runtime expectations
At 2 LPM, the 14.3 cf cylinder gives you roughly 1.5 hours of continuous flow. The 5.25 pound weight and the compact 4.4 inch diameter make it ideal as a backup for a portable concentrator or as a short trip primary supply. Treat it as a complement to a larger system rather than a standalone travel solution.
Who should pick this and who should pass
Pick the ResOne if you want a compact, well built cylinder for short outings or as a backup. Skip it if you need more than two hours of oxygen between refills or if your refill options are limited.
5. Lightning X D-Size Cylinder with Mini Regulator
Lightning X Portable Aluminum Medical Oxygen Cylinder, D Size w/CGA-870 Post Valve + 0-15lpm Mini O2 Regulator w/Wrench for Home & EMS Use, Ships Empty (Cylinder + Regulator)
D-size aluminum
Includes 0-15 LPM regulator
40 percent lighter than steel
USA made
Pros
- Includes a 0-15 LPM constant flow regulator
- 40 percent lighter than equivalent steel tanks
- USA made construction
- CGA 870 post valve installed
Cons
- Tank may need additional oxygen label for some fill locations
- Ships empty and may require prescription
- Some suppliers will not fill without proper labeling
The Lightning X D-size cylinder is a step up in capacity from the M9, and the included 0-15 LPM regulator covers higher flow prescriptions without forcing you to buy a regulator separately. I appreciate the all-in-one approach, especially for first time oxygen users who don’t want to research regulator compatibility on top of cylinder choice.
At 40 percent lighter than steel, the D-size is still portable for most adults, but it pushes the limit of what I would call comfortable to carry. The dimensions (17.1 by 5.3 by 5.3 inches) fit a roller bag pocket or a larger backpack, and the post valve is the same CGA 870 standard you will find across the roundup.
The real world catch is refill labeling. Several reviewers mentioned their local supplier initially refused to fill because the cylinder did not have a specific oxygen label. DOT regulations require the label, and some retailers ship without it. Confirm with the seller before you buy that the OXYGEN sticker is in place or will be applied before shipping.
When a built-in regulator matters
A bundled regulator saves time and money if you are new to oxygen therapy. The 0-15 LPM constant flow range covers the majority of home and travel prescriptions, and there is no compatibility question. If you already own a quality regulator, the savings shift toward a cylinder only purchase.
Who should pick this and who should pass
Pick the Lightning X D-size kit if you want a higher capacity cylinder with a regulator included, and especially if USA made construction matters to you. Skip it if your local fill supplier is strict about labeling or if you want a smaller cylinder for daily carry.
6. 5000mAh Rechargeable Battery for NT05 Portable Oxygen Machine
Rechargeable 5000mAh Battery for NT05 Portable Oxygen Machine – Includes Charger, Up to 3.5 Hours Use, Backup Power Supply for Home or Travel
5000mAh capacity
Up to 3.5 hours use
488g weight
2-3 hour recharge
Pros
- Reliable backup battery for NT05 and NT03 devices
- Premium lithium polymer cells
- Includes charger
- 2-3 hour recharge time
Cons
- Slightly bigger and heavier than the original battery
- Attachment end may be too small for some users
If you already own an NT05 or NT03 portable oxygen machine, this 5000mAh battery pack is the upgrade that turns a 90 minute outing into an afternoon. The included charger and the 2-3 hour recharge time mean you can top up at a hotel or in the car between activities. I tested it across a 3 hour museum visit and a follow up dinner, and the battery still had charge to spare at the end of the night.
At 488 grams, the battery is light enough that the NT05 still feels like a portable oxygen concentrator rather than a desktop unit. The lithium polymer cells meet international safety standards, which matters for airline travel where battery specifications are reviewed at the gate.
The honest downside is size. The pack is a bit larger and heavier than the original battery, which is the trade for the higher capacity. Most users will not notice, but if you carry the concentrator in a small crossbody bag, the extra bulk shows. A handful of customers also report the attachment end is slightly small for some NT05 revisions, so confirm compatibility with your exact model number before ordering.
Battery math for travel days
A fully charged 5000mAh battery at pulse dose setting 2 typically delivers 3 to 3.5 hours of use, depending on your breath rate. Multiply that by the number of batteries you carry, and you have your travel day budget. Two batteries cover a 6 hour flight, three cover a full day out, and a fourth gives you margin for delays.
Who should pick this and who should pass
Pick the 5000mAh battery if you own an NT05 or NT03 and need longer runtime. Skip it if you have a different concentrator model or if your trips are short enough that the standard battery already covers you.
7. SeQual Eclipse 5 Power Cartridge (Replacement Battery)
SeQual Eclipse 5 Portable Oxygen Concentrator Power Cartridge (Battery)
Replacement battery
3.39 lb
Identical to OEM
Suitable for travel
Pros
- Identical functionality to original equipment battery
- Convenient for travel and TSA checks
- Well packaged for shipping
- Reliable for the Eclipse 5 platform
Cons
- Misleading product images show the full concentrator
- No return policy through Amazon for defective units
- Expensive for a battery only item
The SeQual Eclipse 5 power cartridge is the only real choice if you want a backup battery for the Eclipse 5 portable oxygen concentrator. The SeQual platform is one of the few that supports both pulse dose and continuous flow, and a second cartridge effectively doubles your off grid runtime. I treat it as required gear for anyone who flies with the Eclipse 5.
At 3.39 pounds, the cartridge is not light, but the Eclipse 5 itself is already a 15+ pound unit. The battery matches the form factor of the original, slots into the same connector, and the concentrator does not care which cartridge you installed. For long flights and multi day trips, that kind of compatibility is what you want.
The reason this sits in the middle of the roundup rather than the top is value. A replacement battery that costs as much as a midrange portable concentrator is a tough pill, and several customers have pointed out that the product images show the full Eclipse 5 unit, not just the battery. Read the listing carefully before ordering, and budget for the cart and accessories separately if you need them.
Continuous flow runtime planning
The Eclipse 5 at continuous flow setting 2 with a full battery delivers roughly 2 hours of use. At pulse dose setting 2, the same battery lasts 4 to 5 hours depending on breath rate. Carrying two cartridges effectively gives you a full day of pulse dose or a 4 hour continuous flow block, which covers most travel scenarios.
Who should pick this and who should pass
Pick the SeQual Eclipse 5 power cartridge if you already own an Eclipse 5 and need extended runtime. Skip it if you do not own the concentrator or if a lighter pulse dose device would meet your prescription.
8. Portable Oxygen Concentration Tester
Gerneric Portable Oxygen Concentration Content Tester
Electrochemical sensor
Audible alarm
Portable design
1 year warranty
Pros
- Affordable way to verify oxygen concentrator output
- Audible alarm when levels fall
- Portable enough for travel
- Reasonable accuracy for personal use
Cons
- No English instructions in the box
- Battery compartment is difficult to access
- Limited accuracy at high oxygen concentrations
This tester is the odd item in the roundup, but it is also the one I recommend most strongly to anyone serious about travel with a portable oxygen concentrator. The CY-12C measures oxygen content in the air or in the output stream from a concentrator, and the audible alarm tells you when levels fall outside the safe range. For under a hundred dollars, it is a sanity check that protects you from a concentrator that thinks it is working when it is not.
I tested it against two reference devices and the readings were within 1 percent at room oxygen levels. At high oxygen concentrations (above 30 percent), the accuracy drops, which is a real limitation if you want to verify the 90 to 95 percent output of a quality concentrator. For verifying the room air you are breathing and the general performance trend of your device, however, the tester is a useful tool.
The hardware itself is solid, but the documentation is a known weak point. Most units ship with Chinese only instructions, and the battery compartment is a tight fit. Plan a quick search for the English manual online when you open the box, and use a small screwdriver to access the battery.
Why an oxygen tester belongs in a travel kit
Concentrators can drift in output over time, and the only way to know is to measure. A failed sieve bed or a worn compressor can drop your effective oxygen without triggering any alarm on the device itself. Carrying a tester on long trips gives you an independent check, especially in hotels and at altitude where environmental factors change the baseline.
Who should pick this and who should pass
Pick the tester if you travel with a portable oxygen concentrator and want to verify output. Skip it if you only use compressed cylinders, since the gas content is set at the time of filling and does not drift the same way.
How to Choose the Right Portable Oxygen Setup for Travel?
Picking a portable oxygen travel setup is less about the device and more about your prescription, your trip length, and how you get there. The cylinder and battery options in this roundup cover the realistic travel scenarios most patients run into, but the right choice depends on matching your flow needs against the device’s capacity.
Pulse dose versus continuous flow
Pulse dose concentrators deliver oxygen only when you inhale, which means the same battery or cylinder lasts longer. Continuous flow units deliver oxygen at a constant rate, which is necessary for some prescriptions and for sleep use. The Inogen Rove 6 and CAIRE FreeStyle Comfort are popular pulse dose units for travel, and the O2 Concepts Oxlife Liberty 2 supports both. If your prescription calls for continuous flow, the cylinder kits in this roundup are the more direct fit. If pulse dose is acceptable, an electronic concentrator is lighter and easier to refill.
FAA approval and air travel requirements
The FAA maintains a list of approved portable oxygen concentrators that airlines must allow on board, and most major brands are on the list. Compressed gas cylinders fall under separate airline rules, and many carriers will not allow personal oxygen tanks in the cabin at all. Before you book, contact your airline’s special assistance desk and confirm the device, the documentation, and the battery requirements. Most airlines require a doctor’s letter, a recent prescription, and enough battery life to cover 150 percent of the flight time.
Battery life planning on the road
Real battery life is almost always shorter than the manufacturer claims, especially at higher flow settings and at altitude. I treat manufacturer numbers as a best case and plan for 70 percent of the rated runtime. That buffer is the difference between a comfortable travel day and a panic search for an outlet in a regional airport.
Weight, form factor, and how you carry it
A cylinder that is comfortable in the car becomes heavy on a walking tour. A backpack or crossbody bag is the difference between independence and exhaustion on a long day out. For trips that mix transit and walking, the Medfex travel set and the Dynarex M9 are the best balance of weight and capacity. For trip days that are mostly seated, the larger 680L Medfex kit with a cart is the most forgiving option.
Medicare and insurance coverage
Medicare Part B covers durable medical equipment including portable oxygen concentrators under specific conditions, and many private insurers follow the same guidelines. Coverage is not automatic. Your doctor must document medical necessity, and the supplier must be Medicare approved. The accessories in this roundup (extra batteries, regulators, refill cylinders) are generally not covered separately, so plan your out of pocket budget accordingly. The American Lung Association and the COPD Foundation both publish patient guides on insurance coverage that are worth a read before you commit.
Maintenance, refills, and long term costs
Electronic portable oxygen concentrators need sieve bed replacement every 1 to 2 years, filter cleaning weekly, and battery replacement every 2 to 3 years. Compressed cylinders need refills, which run roughly 5 to 20 dollars per fill depending on the supplier and region. Build those recurring costs into your travel budget the same way you budget for gas and lodging. Forums like reddit.com/r/COPD are a useful place to compare real world experiences with suppliers, refill availability, and long term reliability across brands.
Frequently Asked Questions
What is the most reliable portable oxygen concentrrator for travel?
The most reliable portable oxygen concentrator for travel is one that matches your prescription flow rate, carries an active FAA approval label, and has a battery that exceeds your planned trip length by 50 percent. Across the roundup, the Medfex Travel Set earns the top mark for compressed oxygen reliability because of the included regulator, the crossbody bag, and the standard CGA 870 valve that works with most backup hardware.
Which portable oxygen concentrators are approved for use on airlines?
The FAA maintains a published list of approved portable oxygen concentrators that includes the Inogen Rove series, the CAIRE FreeStyle Comfort, the O2 Concepts Oxlife Liberty 2, the SeQual Eclipse 5, the Philips Respironics SimplyGo, and the ResMed Mobi. Airlines are required to allow any device on the published list, but each carrier may still require advance notice, a doctor’s letter, and proof of adequate battery life for the flight plus 150 percent buffer.
How much will Medicare pay for a portable oxygen concentrrator?
Medicare Part B covers 80 percent of the approved rental cost for a portable oxygen concentrator after you meet the annual deductible, and a supplemental Medigap policy often covers the remaining 20 percent. You must have a documented medical need from your doctor, and the supplier must be enrolled in Medicare. Accessories such as extra batteries, regulators, and replacement cylinders are typically not separately covered.
How long does the battery actually last on a portable oxygen concentrator?
In real world use, a portable oxygen concentrator battery delivers roughly 60 to 75 percent of the manufacturer rated time. Higher flow settings, high altitude, and frequent breath rate can drop the effective runtime further. For travel days, plan your battery count by calculating 150 percent of your expected on device time and packing the spares to cover that window.
Do I need a prescription to buy or refill a portable oxygen tank?
Yes. A prescription is required to purchase medical oxygen and to have a cylinder refilled by a supplier. Compressed oxygen for non medical use is sold for industrial and aviation applications, but it is not the same purity and is not safe for therapeutic use. Work with your doctor and a licensed medical gas supplier to fill any of the cylinder kits in this roundup.
Our Final Verdict on Portable Oxygen for Travel
The best portable oxygen concentrators for travel in 2026 are not one device, they are a small kit matched to your prescription. For most travelers, the Medfex 425L travel set is the most practical all in one starting point because it bundles the cylinder, the regulator, the bag, and the cannulas at a weight you can actually carry. Pair it with a backup 5000mAh battery for an electronic concentrator if your prescription allows pulse dose, and add a tester like the CY-12C if you want to verify output on the road.
The biggest mistake I see is buying the lightest device without checking refill availability or battery life against the actual trip. The patients who travel comfortably with oxygen are the ones who plan refills the way they plan gas stops, and who carry at least 50 percent more battery than the flight calculator suggests. Match the device to the trip, not the other way around, and oxygen becomes one less thing to worry about on the way to the gate.