Can You Put a CPAP in Checked Baggage?

Yes. The Transportation Security Administration allows CPAP, APAP, and BiPAP machines in both carry-on and checked baggage at U.S. airports. Still, the safer choice is usually to carry your complete CPAP therapy kit in the cabin. Checked baggage can be delayed or lost, and the machine has mechanical and electronic parts that can be damaged in handling ^{1 2 3}.

The answer changes if your CPAP has a battery or you want to use it during the flight. Spare lithium batteries cannot go in checked baggage, and inflight operation can require advance notice, enough battery capacity, and proof that the model meets applicable aviation standards ^{4 5}.

Why carrying your CPAP on is usually better

The U.S. Department of Transportation lists CPAP machines as assistive devices. On flights covered by the Air Carrier Access Act, an assistive device may be stowed under the seat, in an overhead bin, or in another designated cabin area if it fits and can be stored safely. It does not count toward the passenger's carry-on limit ⁵.

That extra allowance applies to the assistive device and related medical supplies. If you fill the CPAP bag with clothes, toiletries, or other personal items, the airline can count the bag toward its normal allowance and may charge a fee ⁵.

Carrying the complete working kit together is more useful than carrying only the machine. Keep these items in the CPAP bag when space allows:

• The CPAP, APAP, or BiPAP unit.

• The mask, cushion, headgear, and tubing.

• The power supply and any model-specific adapter.

• The empty humidifier chamber or the side cover required to operate without it.

• Any battery you will need, packed according to its chemistry and watt-hour rating.

• A small supply of essential filters or other parts that would be difficult to replace during the trip.

If the device cannot be safely stowed in the cabin, a U.S.-covered airline must carry it in the baggage compartment without charging a checked-bag fee. This is different from voluntarily packing it inside an ordinary checked suitcase ⁵.

If you decide to check the machine

First confirm that the operating airline accepts the device in checked baggage and check whether it contains or is packed with a battery. TSA permission addresses security screening, while the airline and aviation safety rules still control what can be loaded on the aircraft.

Before checking it:

1. Empty the humidifier chamber. Remove all water, let the chamber dry, and pack it so it cannot leak into the machine. The AirSense 11 user guide, for example, instructs users to empty the tub and pack it separately in the supplied travel bag ³.

2. Turn the machine fully off. Do not leave it in standby or in a mode that could start accidentally.

3. Remove spare lithium batteries. Place them in your carry-on with their terminals protected. A power bank or removable CPAP battery counts as a spare battery ⁴.

4. Use the manufacturer-supplied case or another close-fitting protective case. If you put that case inside a suitcase, cushion it away from hard objects and the outside walls.

5. Keep essential therapy parts with you if possible. A machine is not usable without the correct mask, tubing, and power supply.

6. Record the condition and identifying details. Photograph the packed device, its serial number, and any existing damage. Keep the purchase record or current replacement value where you can retrieve it.

7. Label the case inside and out. Include your name, contact details, destination contact, and a plain description such as “medical assistive device.”

If a cabin bag containing the CPAP is unexpectedly taken at the gate, tell the agent that it contains an assistive medical device and ask whether it can remain in the cabin. If it must go into the hold, remove every spare lithium battery and power bank first ⁴.

What happens at a U.S. airport checkpoint

TSA currently says PAP machines, masks, and tubing may remain in their carrying case for X-ray screening. In a standard screening lane, an officer may still ask you to remove the equipment from the case or carry-on. In a TSA PreCheck lane, the equipment may remain in the case and carry-on unless an officer directs otherwise ¹.

Pack the machine where it is easy to reach and follow the officer's instructions. Additional inspection does not mean the device is prohibited. TSA makes the final checkpoint decision when an item alarms, appears altered, or cannot be cleared by the usual screening process ¹.

TSA rules apply at U.S. checkpoints. A security authority in another country may use a different process, including different instructions for removing electronics or screening liquids ².

CPAP battery rules

Check the battery label for its chemistry and watt-hour rating before travel. For lithium-ion batteries under current U.S. passenger-baggage rules:

• A spare battery or power bank must stay in carry-on baggage. Protect exposed terminals from short circuits by using the original packaging, a terminal cover, tape, or a separate protective pouch.

• A battery rated at 100 watt-hours or less is generally permitted without airline approval.

• A battery over 100 watt-hours and no more than 160 watt-hours requires airline approval. No more than two spare batteries in this range are permitted.

• A battery over 160 watt-hours is not permitted in passenger baggage.

• If a battery is installed in equipment placed in checked baggage, the device must be fully switched off and protected from accidental activation and physical damage ^{6 4}.

Airlines may impose stricter limits, and international requirements may differ. IATA guidance also keeps spare lithium batteries in the cabin and advises passengers to confirm the rating and airline policy before travel ⁷.

Battery rules for transport do not automatically tell you how much runtime you need for inflight CPAP use. That is a separate airline accommodation question.

Carrying a CPAP is not the same as using it during the flight

You normally do not need inflight-use arrangements just to bring the machine into the cabin. If you plan to operate it while flying, contact the operating airline before departure ⁵.

For flights covered by U.S. disability rules, the airline may require:

• At least 48 hours of advance notice.

• A manufacturer's label showing that the device meets applicable FAA requirements.

• Enough fully charged batteries to power the device for at least 150% of the flight duration.

• Check-in one hour earlier than the airline's usual check-in time.

• A medical certificate only in the limited situation described by DOT, such as when the airline reasonably doubts that the passenger can complete the flight safely without extraordinary medical assistance ⁵.

Do not assume that a seat outlet will be available, switched on, compatible with the machine, or approved as its power source. Ask the airline what it allows for the exact aircraft and route. Check the device manual for airplane mode and other model-specific instructions.

Do not use a water-filled humidifier in transit unless the manufacturer and airline expressly allow it. ResMed's AirSense 11 instructions warn against operating with water in the chamber on an aircraft or in a vehicle because motion or turbulence can spill water into the device ³.

How to handle distilled water

Empty the humidifier before transport even if you carry the machine on. Pack water separately, buy it after the checkpoint, or obtain it at your destination.

At a U.S. checkpoint, containers holding 3.4 ounces or less can follow the ordinary carry-on liquids rule. TSA also permits larger amounts of medically necessary liquids in reasonable quantities when they are declared and screened separately. If you intend to present a larger bottle of CPAP water as medically necessary, contact AskTSA before the trip and allow time for additional screening rather than assuming it will be accepted automatically ⁸.

Follow the manual for your exact water tub instead of applying one rule to every machine. The current AirSense 11 guide specifies distilled water for its standard HumidAir 11 tub but permits drinking-quality water in its cleanable tub. Other brands and models may give different instructions ³.

International flights need a route-specific check

The Air Carrier Access Act applies to all flights operated by U.S. airlines and to flights to or from the United States operated by foreign airlines. It does not create a universal rule for every flight elsewhere in the world ⁹.

For an international itinerary, check each operating airline, not only the company that sold the ticket. Also check the security authority for every departure or transfer airport. Confirm:

• Whether a separate CPAP bag receives a medical-device allowance.

• Whether advance notice or documentation is required.

• Whether you may operate the exact model onboard.

• Which battery chemistry and watt-hour limits apply.

• Whether the airline requires extra runtime beyond the scheduled flight time.

• Whether cabin or seat power may be used.

• The destination voltage, plug shape, and manufacturer-approved power accessories.

Do not assume that a machine is dual voltage. Read the input range on its original power supply or in its manual. A plug adapter changes the shape of the plug; it does not convert voltage. Use a voltage converter only if the manufacturer permits it.

IATA notes that national security rules govern baggage screening and that airlines may apply their own baggage and battery conditions. A rule that worked on the outbound flight may therefore differ on a foreign domestic connection or the return journey ².

If the CPAP is delayed, lost, or damaged

Report a missing or damaged checked device before leaving the airport and obtain a written reference or claim number. Photograph any damage before using or repacking the machine. If a U.S.-covered airline cannot resolve an assistive-device problem, ask for its Complaint Resolution Official, who is trained to handle disability-related air travel issues ^{5 2}.

On a domestic U.S. flight, an airline can be liable for a lost or damaged assistive device up to its original purchase price rather than the ordinary checked-baggage limit. On an international flight, an applicable treaty may limit payment to less than the full replacement cost ⁵.

Compensation does not provide immediate therapy. If the device is unusable or missing, contact your equipment supplier, sleep clinic, or prescribing clinician to ask about a loaner, rental, or appropriate short-term plan. Do not substitute another machine or change pressure settings without qualified guidance.

The bottom line

A CPAP can go in checked baggage, but cabin carriage is usually the more dependable choice. Keep the bag limited to the device and related medical supplies when relying on the U.S. assistive-device allowance. If checking is unavoidable, remove spare lithium batteries, empty the water chamber, protect the equipment, and keep the parts needed for therapy together.

For inflight use or any international itinerary, verify the exact model, battery, airline, operating carrier, and airport rules before departure.