I'm in a similar situation. I'm flying next Wednesday, and I am in semi-full cycle. I use Apria Health. They're national. I will (hopefully) be able to pick up a tank when I get there, and I'm bringing my mask and regulator. But I'm scared of the plane ride too. I'm going to take nrg drinks and strips, and have a trex shot just in case. Assuming airport security will not confiscate my trex. If you're not in cycle, hopefully everything will be just fine. Good luck to you!