CPAP machines are allowed in carry-on luggage on commercial flights in the United States
The Transportation Security Administration (TSA) permits CPAP machines and BiPAP machines in carry-on bags. You do not have to pack them in checked luggage. The machine itself, the hose, the mask, and the humidifier chamber are all allowed through security screening.
Because CPAP machines are medical devices you use nightly, keeping them with you in the cabin makes practical sense—you can use them on red-eye flights, and you avoid the risk of checked baggage being delayed or lost. The TSA treats CPAP equipment as a reasonable accommodation for sleep apnea, not as a prohibited item.
That said, the screening process at security can vary. Some TSA officers may ask you to remove the machine from your bag for inspection, or they may swab it for explosive residue. This is normal and does not mean the device is prohibited. Having your prescription or a letter from your doctor stating you use a CPAP can speed up the process, though it is not required.
Key Takeaways
- CPAP and BiPAP machines are permitted in carry-on bags and do not count against your bag allowance on most airlines.
- TSA may inspect your machine at security, but this is routine screening, not a sign it is prohibited.
- Carrying your CPAP with you avoids the risk of checked baggage delay and lets you use the machine during your flight if needed.
- A doctor's letter stating you use a CPAP can help explain the device to TSA officers, though it is not mandatory.
- International flights follow different rules depending on the airline and destination country, so check with your carrier before traveling.
How to pack your CPAP for airport security
Pack your CPAP machine in a way that makes it straightforward to remove from your bag if TSA asks to inspect it. Do not wrap it tightly in plastic or seal it in a way that requires cutting open. A soft carrying case or the original box works well.
Keep the hose, mask, and humidifier chamber accessible. If you have a power cord, pack it separately in an straightforward-to-reach pocket. TSA may want to see how the parts fit together, so do not disassemble anything before you reach security—just be ready to show the officer how it works if asked.
If you are traveling with a full-size CPAP machine and a large carry-on bag, measure your bag before you go to make sure it fits within your airline's carry-on dimensions. Most CPAP machines are compact enough to fit in a standard roller bag, but some travel-sized models are even smaller. Check your airline's website for exact carry-on size limits, as they vary.
What happens if your CPAP is flagged at security
If a TSA officer stops to inspect your CPAP, stay calm and explain that it is a medical device for sleep apnea. The officer may ask you to turn it on to confirm it works, or they may swab the exterior for traces of explosives. This is standard procedure for unfamiliar devices and does not mean anything is wrong.
If you have a doctor's letter or prescription paperwork, show it to the officer. This can help them understand the device faster, though many TSA officers are already familiar with CPAP machines. The inspection usually takes a few minutes and does not delay your flight.
In rare cases, an officer may be unsure about the device and ask a supervisor. This is also normal. Be patient and let the process happen. CPAP machines have been screened at TSA checkpoints for years, and the agency has clear guidance that they are permitted.
Using your CPAP during the flight
You can use your CPAP machine during the flight if you have a window or aisle seat with access to a power outlet. Most modern aircraft have USB ports or power outlets in the armrest or seat back, though availability depends on the airline and aircraft type. Check with your airline before booking to see if power is available on your specific flight.
If power is not available, you can use your CPAP for part of the flight or skip it for short trips. Some travelers bring a portable battery pack designed for CPAP machines, though these are expensive and only work with certain models. For flights under six hours, many people straightforward rest without the machine and resume use when they land.
If you are traveling across time zones, you may need to adjust your CPAP settings or your sleep schedule. Talk to your sleep specialist before the trip if you are concerned about how the time change will affect your routine.
International travel with a CPAP machine
Rules for carrying CPAP machines on international flights vary by airline and destination country. Most major international carriers allow CPAP machines in carry-on bags, but some have specific requirements or restrictions. Contact your airline at least two weeks before your flight to confirm their policy.
You may also need to check the regulations of your destination country. Some countries require medical devices to be declared or documented. A letter from your doctor stating that you use a CPAP for a medical condition can help if customs officials ask questions.
If you are traveling to a country where you do not speak the language, consider printing a straightforward note in that language explaining that you use a CPAP for sleep apnea. This can help if airport staff need clarification. Your airline may also be able to provide translation information.
Packing a backup mask and supplies
Pack at least one backup mask in your carry-on bag. If your mask breaks or stops fitting properly during your trip, you will need a replacement to use your machine. Masks are small and lightweight, so there is no reason to leave them behind.
Bring extra tubing if you have room. Hoses can crack or develop leaks, and a spare gives you peace of mind. If you use a humidifier, pack distilled water in your checked bag (not carry-on, as liquids are restricted). Many hotels have distilled water available, so you can also ask the front desk when you arrive.
If you are traveling for more than a week, consider mailing supplies to your destination in advance or researching whether you can order them locally. This reduces what you have to pack and gives you a backup plan if something gets lost.
What to do if your CPAP is lost or damaged
If your CPAP is damaged during travel or lost in transit, contact your airline when ready and file a claim. Keep your receipt or proof of purchase. Airlines have liability limits for checked baggage, but carry-on items are usually covered more generously.
While waiting for a replacement, ask your hotel if they have a CPAP machine you can borrow, or contact a local medical supply company to see if you can rent one. Many cities have sleep clinics or durable medical equipment suppliers that rent machines short-term.
To prevent loss, label your machine with your name and phone number. Take a photo of it before you leave home. If it is lost, you will have proof of what it looks like and what condition it was in.
Frequently Asked Questions
Do I need a prescription or doctor's letter to bring my CPAP through airport security?
No, a prescription or letter is not required. TSA permits CPAP machines without documentation. However, having a letter from your doctor can speed up the screening process if a TSA officer is unfamiliar with the device or wants confirmation that it is a legitimate medical device.
Can I pack my CPAP in checked baggage instead of carry-on?
Yes, you can check your CPAP, but it is not recommended. Checked baggage can be delayed, lost, or damaged, and you will not have access to your machine if you need it during the flight or if your luggage is late arriving at your destination. Carry-on is safer.
Will my CPAP machine work on the airplane's power supply?
Most CPAP machines run on standard 110-volt power, which matches U.S. outlets. If your aircraft has power outlets, your machine will work. International flights may have different outlet types, so bring a universal power adapter. Check your airline's website to see if power is available on your specific flight.
What if I am traveling outside the United States?
Rules vary by airline and country. Contact your airline before booking to confirm they allow CPAP machines in carry-on. Some countries may require you to declare medical devices or provide documentation. A doctor's letter is helpful for international travel.
Can I use my CPAP machine during takeoff and landing?
No. You must turn off all electronic devices during takeoff and landing per FAA regulations. You can use your CPAP once the aircraft reaches cruising altitude and the captain turns off the seat belt sign, and you must turn it off before descent begins.