Flying With CPAP: TSA, Batteries, and Airline Rules

Quick answer: You can fly with a CPAP machine. TSA allows it through security, and airlines generally permit it as a medical device. Keep the machine in your carry-on, empty the humidifier before security, pack spare batteries in the cabin, and bring a copy of your prescription. Check your airline's rules before the trip, especially for international flights.

At the security checkpoint

TSA treats CPAP machines as medical equipment. You can send it through the X-ray in its case. Officers may ask you to remove it from the bag or swab it for explosives. That is routine. You can ask for a private screening if you prefer, and you can request that the machine not be separated from you.

Do not put the machine in checked luggage. It can be lost, damaged, or exposed to extreme temperatures. A soft travel case inside your carry-on protects it and makes the checkpoint easier.

Empty the water chamber before you leave home. Water is not allowed through security in a container larger than the usual liquid limit, and a full chamber can leak into the machine.

Airline policies

Most U.S. airlines allow CPAP as a medical device in addition to your carry-on allowance, but the rules vary. Some count the machine as a personal item. Check the airline's accessibility or medical device page before you fly. International carriers may require advance notice or a medical clearance form.

If you need to use CPAP during the flight, ask the airline in advance. Aircraft power outlets are not guaranteed to be compatible, and some seats do not have one. A charged battery is the safer plan. Cabin air is dry, so a nasal saline spray can help.

Batteries and power

Spare lithium batteries generally must travel in the cabin, not in checked baggage. There are watt-hour limits, and larger batteries need airline approval. Keep batteries in their original cases and protect the terminals from short circuits.

If your machine has an airline mode, use it. It reduces power draw and may allow the device to run from a seat outlet. Do not plug into an outlet without asking the crew.

Water and humidity on the road

Distilled water is not always available at the airport or hotel. You can buy it after security or at a pharmacy near your destination. In a pinch, bottled water is better than nothing, but it can leave mineral scale over time. Rinse and dry the chamber when you arrive.

If you are camping or staying somewhere without distilled water, use the humidifier on a low setting or turn it off. A dry room can make your nose uncomfortable, so saline spray helps.

What to pack

• CPAP machine and power supply
• Mask, hose, and spare cushion
• Empty humidifier chamber
• Extension cord or power strip
• Copy of your prescription and a note from your clinician
• Spare filters
• Charged battery if you use one
• Saline nasal spray

A plug adapter is necessary for international travel. Most modern CPAP power supplies accept 100–240 volts, but check the label. Do not use a voltage converter unless the manufacturer says it is needed.

If your equipment is lost or damaged

Carry your prescription separately from the machine. If the machine is lost, a supplier can often help you replace it, but you may need a copy of the prescription and a call to your insurer. Travel insurance may cover equipment, but check the policy before you rely on it.

For supplies before a trip, see CPAP supplies near you. For the basics of therapy, read CPAP therapy: getting started.

A short pre-flight checklist

1. Empty and dry the humidifier.
2. Charge the battery and pack the correct cable.
3. Put the machine in carry-on, not checked luggage.
4. Pack a copy of the prescription.
5. Check the airline's medical device policy.
6. Confirm the hotel has a nearby outlet and access to distilled water.

Connecting flights and lost equipment

If your bag with the CPAP is lost, file a claim at the airline desk before leaving the airport. Keep the prescription and a photo of the serial number on your phone. A replacement machine may take days, so a travel backup or a loaner plan is worth considering for long trips.

Checkpoint tips

Place the machine in a bin by itself if the officer asks. You can request a pat-down instead of an X-ray for the device, though it takes longer. Do not put the machine on the belt with shoes or liquids. A clear plastic bag for the hose and mask keeps things organized.

Airline power outlets

Even if a seat has a power outlet, it may not accept your CPAP plug or provide enough continuous power. Ask the airline about the outlet type and whether medical devices are permitted. A battery remains the safer option.

Frequently Asked Questions

Does TSA allow CPAP machines?

Yes. CPAP is allowed through security checkpoints. Officers may ask you to remove it from the case or swab it. You can request private screening.

Can I use my CPAP on an airplane?

Some airlines allow it if the seat has a compatible power outlet, but it is not guaranteed. A charged battery is more reliable. Ask the airline before you fly.

Can I pack my CPAP in checked luggage?

It is strongly discouraged. Checked bags can be lost, damaged, or exposed to extreme temperatures. Keep the machine in your carry-on.

Can I bring distilled water for my CPAP through security?

Water is subject to the usual liquid limits. Empty the chamber before security and buy distilled water after you arrive or at a pharmacy near your destination.

Do I need a prescription to fly with CPAP?

A prescription is not usually required for security, but carrying a copy helps if questions come up and is useful if you need replacement equipment.

What about international travel?

Check the airline's medical device rules, bring a plug adapter, confirm your power supply accepts the local voltage, and carry your prescription. Some countries have different rules for medical devices.

This article is general information, not medical advice. Symptoms, testing, and treatment decisions depend on your own history, so talk with a clinician who can evaluate you.

Related reading

• CPAP therapy: getting started
• CPAP supplies near you