Are you really concerned about the air-conditioning or are you concerned about altitude and how well the planes are pressurized? Typically planes are pressurized to 6,000 to 8,000 feet. As Wanda says, there is a test (High Altitude Saturation Test) which does exactly what you need to know about whether you'd need supplemental O2 on the plan or not. I fly twice a month most of the time, I use a POC to fly, and it's really not a problem. Bring your anti-bacterial wipes with you and use the typical precautions and yuou should be fine.

Jean

I am flying to Orlando with my sons family. I let my Doctor know well in advance. He ha me go and get checked before I leave. When I seen him he gave me pregnazone in case of an attack. He also gave me an antibiotic because he said on the plane you tend to catch things faster.
I also phone the air line and let them know my condition and they are going to have someone met me at the airport to help me through the thermals. I also am taking my scooter and they helped with that also. After going though all that I feel much more safer to go! It's a little work but well worth the peace of mind

went I fly, I order oxygen from airlines Medic Desk ,they have it on broad went I get on the plane ,they set it up for me ,,

Yes, you need to have a barometric chamber test. Your doctor can order this for you. I have had it done to see if I can be on a plane without oxygen. You are put in a chamber and the altitude rises just like being in a airplane and it will show at what altitude you need oxygen, or if you don't need it at all.

I have also been worried about my husband flying. We have been invited to visit my husband's daughter in Scotland in August. Im worried about the flight as well as how he will cope in the colder air in Scotland.