Quick summary
A 71-year-old Utah man’s portable oxygen concentrator lost power mid-flight on a United Airlines Salt Lake City–Houston service, leaving him without supplemental oxygen for the remainder of the journey despite advance notice to the carrier. His attorney has announced plans to file a lawsuit against United, which offered the passenger a $150 flight credit in response. The case turns on a federal rule most oxygen-dependent travelers don’t know exists: the 150% battery requirement that the U.S. Department of Transportation allows airlines to impose.
United’s published policy explicitly warns that in-seat power outlets are not a reliable primary source for medical devices. That warning has real consequences for anyone flying with a concentrator.
The flight from Salt Lake City International Airport to Houston George Bush Intercontinental Airport was roughly two hours in when the battery powering the passenger’s portable oxygen concentrator gave out. He flagged a flight attendant. Crew moved him to seat 6C, closer to an electrical outlet, but the outlet kept the device running only briefly before it shut down again. He spent the rest of the flight without supplemental oxygen — oxygen his doctors had prescribed for chronic obstructive sleep apnea and chronic obstructive asthma.
The passenger had notified United staff about his equipment before boarding and carried documentation for his device. After landing, United’s response was a $150 flight credit. His attorney has since announced plans to file a civil lawsuit against the airline, though no filing has been confirmed in court records and all allegations remain unproven.
Simple Flying first reported the passenger’s account. The incident has drawn attention to a regulatory gap that affects a much wider group: the tens of thousands of Americans who travel annually with portable oxygen concentrators and may not fully understand where airline policy ends and federal obligation begins.
What federal rules actually require — and what they leave to airlines
The 150% battery rule is not a United invention. The U.S. Department of Transportation’s portable oxygen guidance explicitly permits airlines to require passengers to carry enough battery power to run their concentrator for at least 150% of the planned flight time, including connections. On a three-hour nonstop, that means batteries rated for four and a half hours minimum — before the trip even begins.
The FAA’s position reinforces this. FAA Advisory Circular AC 120-95A places battery responsibility squarely on the passenger, not the carrier. Airlines may require the 150% coverage as a condition of travel, and the FAA’s hazardous materials guidance separately prohibits passengers from carrying compressed or liquid oxygen — meaning a portable oxygen concentrator with compliant batteries is the only approved option for in-flight supplemental oxygen.
| Requirement | Who sets it | Passenger obligation |
|---|---|---|
| Battery capacity: minimum 150% of planned flight time | DOT (airlines may enforce) | Passenger must supply and carry batteries |
| Advance notice of device use | DOT / airline policy | Up to 48 hours before departure |
| Medical documentation | Airline policy (DOT-permitted) | Passenger must provide on request |
| Device approval (FAA-compliant concentrator) | FAA | Only approved models permitted onboard |
| In-seat power outlets as primary power source | Airline policy | Not permitted — outlets are supplemental only |
United’s own policy mirrors the federal framework: passengers must bring fully charged batteries covering 150% of total scheduled flight time, and the airline’s documentation explicitly states that onboard power outlets cannot serve as the primary power source for essential medical equipment. That last point is the crux of the Salt Lake City case — the passenger appears to have relied on outlet power as a fallback, which the policy does not support.
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Why the rules create a gap that catches travelers off guard
Federal rules protect the right to fly with a concentrator. They do not guarantee the flight goes smoothly if something fails.
Under the Air Carrier Access Act, U.S. carriers and many foreign airlines operating to the U.S. must accept compliant portable oxygen concentrators and cannot deny boarding solely because a passenger requires one. DOT guidance also requires airlines to apply their battery and documentation rules consistently and to provide disability-related assistance once a passenger is accepted for travel. But “assistance” in this context means helping with logistics — not supplying oxygen if a device fails mid-flight.
Major U.S. carriers broadly apply the same 150% battery standard, but their pre-flight communication varies considerably. Some airlines conduct pre-boarding briefings so crew understand how to respond if a concentrator malfunctions; others publish minimal guidance and leave passengers to interpret policy documents on their own. That inconsistency matters most when something goes wrong at 35,000 feet — where the options are limited and the stakes are not abstract.
If a traveler believes an airline mishandled their medical device needs, three formal channels exist: airline customer relations (the $150 credit route), a DOT disability complaint, or civil litigation. Legal outcomes hinge on whether both the passenger and the airline followed applicable policies and federal rules — which is precisely why the planned lawsuit in this case will be closely watched by disability advocates and aviation attorneys alike.
How to protect yourself before the battery runs out
In-seat power on commercial aircraft is not certified medical infrastructure — it can drop during turbulence, seat changes, or power cycling events, and no airline policy requires it to stay on for your device.
- Calculate your battery requirement before booking: Add up total scheduled flight time including all connections, then multiply by 1.5. That is your minimum battery capacity. Build in extra margin for delays — a two-hour tarmac hold is not hypothetical.
- Notify the airline’s accessibility desk at least 48 hours out: A phone call creates a record. Email confirmation is better. Document the name of the agent you spoke with and the time of the call.
- Download the airline’s current medical device policy: Policies change. The version on the airline’s website the week of your flight is the one that applies — not what you read six months ago.
- Treat in-seat power as a bonus, not a plan: If your battery math only works because you’re counting on an outlet, you are not compliant with DOT guidance and you are not safe. Carry the batteries.
- Know your complaint options before you fly: DOT’s Aviation Consumer Protection Division accepts disability complaints online. Filing within 45 days of an incident preserves your options and creates a federal record independent of any airline credit offer.
Watch: Whether the planned lawsuit against United proceeds to filing — and on what legal theory — will signal whether courts are prepared to hold carriers accountable when in-flight medical equipment fails despite advance notice. A filed complaint with case number would be the first concrete development to track.
Questions? Answers.
Can an airline deny boarding if my portable oxygen concentrator battery doesn’t meet the 150% requirement?
Yes. Under DOT guidance, airlines may set battery capacity requirements as a condition of travel. If your batteries do not cover 150% of the total scheduled flight time including connections, the carrier can refuse to allow you to use the device onboard — and in some cases may deny boarding. Verify your battery capacity against the specific airline’s policy before you arrive at the gate.
What should I do if my oxygen concentrator fails mid-flight?
Alert a flight attendant immediately and ask to be moved to a seat with an outlet as a temporary measure — but understand that outlet power is not guaranteed. If the device cannot be restored, the crew may contact medical ground support via radio. After landing, document everything in writing: seat numbers, crew names if possible, time of failure, and any assistance offered. File a DOT disability complaint within 45 days if you believe the airline’s response was inadequate.
Does the Air Carrier Access Act require airlines to provide supplemental oxygen if my device fails?
No. The Air Carrier Access Act requires carriers to accept compliant portable oxygen concentrators and provide disability-related assistance, but it does not obligate airlines to supply oxygen or a replacement device if a passenger’s own equipment fails mid-flight. The responsibility for sufficient battery power rests with the passenger under both DOT guidance and FAA advisory material.
Is a $150 flight credit an adequate response to a mid-flight oxygen failure?
That is ultimately a legal question, not a policy one — and it may be answered by the courts if the planned lawsuit in this case proceeds. Under current DOT rules, airlines are not required to offer a specific minimum compensation for medical device failures. Passengers who believe the airline’s response was inadequate can escalate through DOT’s Aviation Consumer Protection Division or pursue civil litigation, though outcomes depend on whether both parties followed applicable rules.
