The rules for medical devices on flights from the UK are set mostly by each airline, within international safety requirements. The UK Civil Aviation Authority’s guidance is the common starting point. This guide summarises it, read on 14 October 2026.
CPAP machines
- Check with the airline before booking about taking your CPAP on board. Ask whether it needs a letter from your GP confirming you need it.
- Power isn’t guaranteed. The CAA says there’s no guarantee of a power source on board, so the airline may suggest a dry-cell battery-operated device.
- Security. Electrically powered medical equipment is usually X-rayed in a separate tray. Carry a doctor’s letter or your prescription in case security staff ask.
A small travel CPAP such as the ResMed AirMini can make battery use easier. See buying a CPAP privately.
Portable oxygen concentrators
- Tell the airline in advance and check its requirements. The CAA says this applies to any electrically powered medical equipment you take on board.
- Bring enough battery. Most airlines don’t provide aircraft power for passenger medical equipment, so to use it in flight it must run on battery. All batteries, including spares, must meet the airline’s carriage rules.
- Take-off and landing. You usually can’t use electronic equipment during take-off and landing. Some devices are tested and approved for use throughout the flight, but you must agree this with the airline well before travel.
Battery life varies a lot by setting. See portable oxygen concentrators in the UK.
Oxygen cylinders
International requirements allow small oxygen or air cylinders for medical use, but only with the airline’s prior agreement. Some airlines let you bring your own. Others supply special cylinders, usually for a fee. Some don’t allow either.
Damage and insurance
Airlines are liable for damage to mobility equipment, but the CAA says compensation is often limited to around £1,300. For an expensive concentrator, consider extra insurance.
Planning timeline
| When | Action |
|---|---|
| Before booking | Ask the airline about your device, battery rules, forms and fees |
| A few weeks ahead | Get a doctor’s letter. Arrange any airline medical clearance it asks for |
| Before you fly | Charge all batteries. Pack the device and spares in hand luggage as the airline directs |
| At the airport | Expect the device to be X-rayed separately. Have the letter ready |
| At your destination | If you use NHS oxygen, arrange local supply in advance. See home oxygen abroad |
The verdict
Before you book, ask the airline about your device and its batteries, and get its answer in writing. Plan to run on battery for the whole flight. Carry a doctor’s letter. Arrange oxygen at your destination before you leave.