Originally Posted by Pat89339

I have been flying with a BiPap for a little more than a year now. Last year 7 international r/t flights on UA, mostly in C with two legs Y. UA has an AeroMedical Desk staffed with terrific agents. They require a minimum of 48 hours notice to set up electrical for the flight. They will tell you if you have an approved machine. On planes without in-seat power UA will bring power to your seat, but you must have an original manufacturer cigarette lighter adapter for your equipment. Mine cost about $30 for my $5000 machine.
While CPaps and BiPaps are prescribed for similar illnesses, equipment varies. My BiPap is more like a mini-respirator, which explains the cost. While some may not die from not using their CPaps, I can die from not using my BiPap. So I would not necessary heed the medical advice tossed around in this thread and would instead ask my treating physician how harmful it would be to you if you went without the CPap for a night while flying.