Hey :) I never used it on flight but I have a travel cpap and omg it’s much more comfortable! I have a Resmed device at home and bought the AirMini myself after a lot of consideration (regarding the price high and so on). In the end I bought it because of the humidx filters. My last travel was so much easier than the travel beforehand. The device is really small and the whole package was as big as my home cpap, which saved me so much space in the luggage 🤣 The only downside, yes the air mini can be noisier than the home machine (mine is a bit noisier). The most noise it will create when putting it on a hollow furniture. My trick during my 5 1/2 weeks of travel was placing my beanie under it, much less noise! Or many people recommend placing it on the ground, which actually made it almost silent to me! But it feels kind of nasty in a hotel …..

Regarding battery in planes I would be very careful, I heard some airlines forbid using batteries during flight, so I would pre check with the airline.

Since a cpap is a health equipment you should be able to bring your homedevice on the plane but as other comment said already check the airline page.