Breathing at 35,000 feet isn’t the same as breathing at sea level. For passengers with respiratory or cardiac conditions, that difference can turn a routine flight into a real health risk.

At cruising altitude, the partial pressure of oxygen drops sharply. Your body takes in less oxygen than it does on the ground. Healthy travelers feel mild fatigue at most. But for people with chronic obstructive pulmonary disease (COPD), asthma, or heart disease, it can trigger shortness of breath, dizziness, or worse. This guide covers what Delta, United, and American Airlines offer for passengers who need supplemental oxygen, what you’ll need to qualify, and how to request the service before you fly.

Understanding Inflight Oxygen Needs

Commercial aircraft cruise at roughly 30,000 to 40,000 feet. At that height, the cabin air contains far less oxygen than the air at sea level. This reduced oxygen availability can lead to hypoxia, a condition where the body doesn’t receive enough oxygen to function properly.

For individuals with conditions such as COPD, asthma, or heart disease, the risk of symptoms rises during air travel. At high altitudes, the drop in oxygen’s partial pressure can cause shortness of breath, dizziness, and fatigue. For some passengers, those symptoms can become serious without proper management.

That’s why assessing your health status before flying matters. A healthcare provider can evaluate your specific needs and recommend whether you’ll need supplemental oxygen during the flight.

Delta’s Inflight Oxygen Services

Delta Air Lines offers inflight oxygen service for passengers who need supplemental oxygen during their journey. The airline provides portable oxygen concentrators (POCs) approved for onboard use, so passengers can maintain their oxygen levels without bulky tanks. Delta’s policy follows Federal Aviation Administration (FAA) regulations, which ensures all equipment meets safety standards.

To use Delta’s inflight oxygen service, you must notify the airline at least 48 hours before your flight. This gives Delta time to confirm equipment availability and prepare for your needs. Check your specific POC model against Delta’s approved list before travel to avoid problems at the airport.

Delta also provides operating instructions for the equipment so you feel comfortable using it during the flight.

United’s Inflight Oxygen Services

United Airlines offers inflight oxygen services for passengers with medical needs. Like Delta, United allows FAA-compliant portable oxygen concentrators onboard. The airline maintains a list of approved POC models to keep all equipment within safety standards.

To access United’s inflight oxygen services, notify the airline at least 48 hours before departure. This advance notice gives United’s team time to prepare for any special requirements related to your oxygen needs. Staff receive training to help passengers manage their equipment during the flight.

United also recommends you carry enough spare batteries for your POC for the full flight, since onboard power may not always be available.

American’s Inflight Oxygen Services

American Airlines lets passengers use supplemental oxygen during flights when they use FAA-compliant portable oxygen concentrators. The airline maintains an approved POC list and gives guidance on how to operate devices effectively during the flight.

You must notify American Airlines at least 48 hours in advance if you plan to use inflight oxygen services. Staff can answer questions about POC use onboard, and the airline recommends you bring extra batteries and chargers to keep your oxygen supply running throughout the journey.

What Airlines Require Before Your Flight

Each airline sets specific requirements for passengers who need inflight oxygen, focused on safety and FAA compliance. The 48-hour advance notice rule applies to Delta, United, and American Airlines. This window lets the airline confirm equipment availability and make any needed accommodations.

Most airlines also ask for medical documentation from a healthcare provider confirming your need for supplemental oxygen during air travel. This typically includes your diagnosis, prescribed oxygen flow rate, and any other details that help cabin crew support you properly.

Familiarize yourself with your airline’s exact requirements well before your travel date. Rules can vary by carrier and aircraft type.

How to Request Inflight Oxygen

Starting the Request

Contact your airline directly through customer service or its website. Do this as early as possible — ideally when you book — so the airline has maximum time to prepare. Don’t wait until you’re a few days out.

Providing Your Medical Information

When you request inflight oxygen, be ready to share your POC model, your required flow rate, and any additional support you’ll need during the flight. Many airlines offer online forms or dedicated medical assistance sections on their websites where you can submit this information directly.

Confirming the Arrangements

Follow up with the airline a day or two before your flight to confirm the arrangements. Clear communication with airline staff helps avoid last-minute surprises at the gate.

Costs and Coverage for Inflight Oxygen

The cost of inflight oxygen services varies by airline and by how you source your equipment. Airlines generally don’t charge fees for using your own approved portable oxygen concentrator onboard. Costs arise if you need to rent a POC from a third-party provider.

Insurance coverage for inflight oxygen also differs by plan. Some providers cover the purchase or rental of a portable oxygen concentrator; others don’t cover travel-related medical equipment costs at all. Check with your insurance provider before you travel to understand what’s covered and what documentation you’ll need for any reimbursement claim.

What Medical Documents You’ll Need

Medical documentation plays a key role in getting inflight oxygen approved. Most airlines require a letter from your healthcare provider confirming your medical condition, prescribed oxygen flow rate, and your need for supplemental oxygen during flight.

Make sure this letter reflects your current health status at the time of travel. Some airlines have specific forms for healthcare providers to complete — ask when you make your request. Carry multiple printed copies when you travel, since you may need to show them at check-in, at the gate, or during the flight.

Alternatives If You Can’t Use Inflight Oxygen

If inflight oxygen services aren’t an option for you, a few strategies can reduce your risk. Traveling with a companion familiar with your condition adds a layer of support and reassurance throughout the journey.

Choosing non-stop flights cuts total travel time and removes the stress of layovers, where delays could disrupt your medication schedule or access to equipment. Direct routing also means fewer gate changes and less physical exertion in the terminal.

Scheduling flights to align with your medication routine can also make a real difference. Talk with your doctor about timing your travel around doses for better symptom control at altitude.

Tips for Traveling With Supplemental Oxygen

Good planning makes inflight oxygen travel far smoother. Arrive at the airport early to allow time for check-in and security screening. Let airport staff know about your medical needs when you arrive so they can guide you through the process efficiently.

Know the layout of your departure airport before you go. Locate accessible facilities, elevators, and gate areas in advance to reduce anxiety on travel day. Many major airports publish accessibility maps on their websites.

Pack extra batteries and chargers for your POC. Backup power keeps your oxygen supply uninterrupted if onboard charging isn’t available or if your flight is delayed.

How to Choose the Right Airline for Your Oxygen Needs

Not every airline handles inflight oxygen the same way. Policies differ on approved POC models, advance notice requirements, and the level of staff support during the flight. Researching these policies before you book lets you pick the airline that best fits your health needs and travel plans.

Contact each airline’s accessibility or medical assistance team directly with specific questions. A quick call before booking can save significant stress later. Your doctor may also have recommendations based on experience with other patients who fly regularly with supplemental oxygen.

Frequently Asked Questions

What is inflight oxygen and why is it needed?

Inflight oxygen refers to supplemental oxygen provided to passengers during a flight. Passengers with certain medical conditions or disabilities may not breathe adequately at high altitudes, where cabin air contains less oxygen than at sea level. Supplemental oxygen helps maintain safe blood oxygen levels throughout the flight.

Which airlines provide inflight oxygen?

Several airlines offer inflight oxygen for passengers who require it, including Delta, United, and American Airlines. Availability may vary by aircraft type and route. Contact your airline in advance to confirm whether the service applies to your specific flight.

How can passengers request inflight oxygen?

Contact your airline at least 48 hours before departure to request inflight oxygen. Airlines have specific procedures and may require medical documentation or certification. Follow your airline’s instructions carefully and confirm the arrangement a day before travel.

Is there an additional cost for inflight oxygen?

Some airlines charge for inflight oxygen services; others offer it at no extra cost when you use an approved POC you already own. Costs may apply if you rent equipment from a third-party provider. Ask your airline about fees when you make your request.

What type of inflight oxygen is provided?

Airlines typically permit FAA-approved portable oxygen concentrators (POCs) for passenger use. Some aircraft also carry onboard oxygen cylinders for emergency use. The specific equipment available depends on the airline and aircraft. Ask your airline which options apply to your flight.

Getting inflight oxygen sorted before you fly comes down to three steps: talk to your doctor, contact your airline early, and arrive prepared with the right documentation and backup supplies. Delta, United, and American Airlines all have systems in place to support you. Your job is to reach out before the 48-hour window closes.

Start with your healthcare provider, get the paperwork in order, and call the airline when you book your ticket. A bit of planning upfront means you can focus on your destination, not your oxygen supply.

References

1. Portable Oxygen Concentrators on Aircraft — Federal Aviation Administration (FAA)
2. Traveling With Oxygen — United Airlines
3. Air Travel With COPD — American Thoracic Society