Not if you have a medical condition like sleep apnea.

I wish I could go to sleep on a plane. I’m someone who can sleep in most vehicles. Unfortunately it’s that same reason I can, which is why I shouldn’t.

You can use your CPAP machine with a external battery pack on airplanes. I do this regularly when flying long distances. In principle you should be able to also just plug in to the power sockets but for some reason this goes against most airlines policies.

Mine doesn’t support that.

The reason airlines don’t allow CPAP to be plugged in is because they don’t want people to suffocate if the power goes out in the cabin. But that’s just bonkers because CPAP masks have an escape valve for that purpose already.

In the end, I gave up arguing with the airlines and just keep myself busy on flights. It makes the travel much less comfortable but the one upside is I almost never have jet lag.