Hi Jessie, I have COPD and am on Oxygen full time, along with my other NET problems. Since you mention "Lung Doctor", I thought I would mention that if you are on Oxygen you must carry enough battery supply for your Oxygen concentrator to last two times the length of the posted flight time. No plug on a plane. That's a hell of a lot of battery, so I thought I'd mention it, even though I don't know if you even use Oxygen. Enjoy your vacation! Regards, Rick