Traveling With Oxygen: POC Rentals, Airline Pre-Approval, and the 19-Hour Battery Rule

If you use supplemental oxygen, flying takes more planning than other senior travel. But it is absolutely doable in 2026. The single rule that changed travel for oxygen users was the Federal Aviation Administration's 2016 standardization of portable oxygen concentrator (POC) approval. Today, every major U.S. airline allows passengers to use FAA-approved POCs in flight, free of charge, with the right paperwork.

A POC is a small electric device that pulls oxygen from cabin air and delivers it through a nasal cannula. It weighs 3 to 10 pounds, fits under the seat, runs on rechargeable batteries, and replaces the old large oxygen tanks that airlines stopped accepting years ago. The two most common rented or purchased POCs that airlines approve are the Inogen One G5 and the Philips Respironics SimplyGo Mini. Both are on the FAA approved list. Both can be rented for travel from Inogen Direct, Oxygen To Go, Main Clinic Supply, and Scootaround for about 25 to 45 dollars a day, including extra batteries.

The airline rule that catches most first-time oxygen travelers is the 19-hour battery requirement. Every U.S. airline requires that you bring enough fully charged batteries to power the POC for 150 percent of the total expected flight time, including connections and delays. For a 6-hour transcontinental flight with a 2-hour connection, that means 12 hours of battery. The 19-hour figure is for longer international flights. Most POC batteries last 4 to 6 hours each. So you usually need three to four batteries on board. Renting from a service that includes the right number of batteries is much easier than buying them piecemeal.

The paperwork side is firm but predictable. Every airline requires a Physician Statement form, signed by your doctor within the last six months, confirming that you need oxygen, what flow rate, whether you need it continuously or only with exertion, and that you are medically cleared to fly. Each airline has its own form (United uses the OK to Travel form, Delta uses the Medical Certificate for Air Travel, American uses the Medical Statement). Download the airline's specific form from their website, print it, take it to your doctor's appointment, and let your doctor fill it in completely. Submit by email to the airline at least 48 hours before the flight. Keep the original on your person at the airport.

Cruise lines have their own oxygen rules, mostly looser than airlines. Most cruise lines allow standard oxygen tanks (not concentrators) on board if the cruise line is notified in writing at least 14 days before sailing. Rental companies will deliver oxygen tanks directly to your cabin at the embarkation port. Hotels and vacation rentals do not restrict oxygen use, but some require notification if a tank or concentrator is in the room because of fire-safety insurance rules.

Road travel by car is the least restricted. You can carry as much oxygen as you want, but never let tanks roll loose in the trunk and never store them in direct sun on a hot day. Trains under Amtrak allow oxygen in the cabin with 48 hours notice. Greyhound and Megabus allow oxygen with no advance notice but require the passenger to remain with the equipment at all times.

(Sources: Federal Aviation Administration POC approved list at faa.gov; Delta, American, Southwest, and United medical desk pages; Amtrak Accessible Travel page; Inogen and Philips Respironics travel guides, accessed May 2026)