Yes. CPAP, BiPAP and APAP machines are allowed through TSA, and under US DOT rules airlines can't count an assistive device like a CPAP toward your carry-on limit. Keep lithium battery-powered units and spare batteries in the cabin.
Allowed. The machine, mask and tubing can stay in the case, but in standard lanes you may have to take it out of your carry-on for X-ray; PreCheck travelers can leave it in. US airlines may not count it toward your carry-on allowance (a case also stuffed with personal items can be counted).
TSA allows CPAPs in checked bags, but units with lithium batteries should be carried on, and spare lithium CPAP batteries are banned from checked bags. Carrying it on also protects a device you need.
Checked against official TSA, FAA and government pages on . These are US rules unless we say otherwise; the TSA officer at the checkpoint makes the final call.
The rules in numbers
- Assistive devices don't count toward carry-on limits on US carriers (14 CFR 382.121)
- Spare lithium-ion CPAP batteries: carry-on only, up to 100 Wh; 101–160 Wh with airline approval, max two
- Nebulizer liquids: exempt from 3-1-1 in reasonable quantities
Packing tips
- Keep the CPAP in a dedicated case with only medical items so it isn't counted as a personal item.
- If you plan to use it in flight, ask your airline in advance about onboard use and power.
- Bring a copy of your prescription or a doctor's note; it helps abroad and with airline staff.
Questions people ask
Does a CPAP count as a carry-on?
Not on US airlines: DOT rules say carriers must not count assistive devices like CPAPs toward the carry-on limit.
Do I have to take my CPAP out at TSA?
In standard lanes you may be asked to remove it from your bag, but it can stay in its case. PreCheck travelers can leave it in the bag.