I am so sorry this happened to you! I was diagnosed with NAION 6 months ago, age 53, pretty healthy. I did not get mine from flying, but there is new research out that says if you have the risks factors for NAION (small cup to disc ratio in eye/optic nerve, diabetes, high cholesterol, high blood pressure that goes too low at night from blood pressure medication, or sleep apnea), flying can also be a risk or hiking at very high altitudes. Some people with NAION do fine with flying, but most are advised not to fly within 6 months of a NAION attack. People who continue to fly stay hydrated, get up and walk around as much as possible on flights, don’t sleep on flights, or bring an oxygen concentrator with them. You should probably get tested for sleep apnea and check all other risk factors, especially any having to do with blood flow to the eye (24 hour blood pressure monitoring, check your heart with a cardiologist).
Again, so very sorry you’re going through this! Try to get an appointment with a neuro-ophthalmologist, they are the most knowledgeable about Naion. Also, check out the Naion support group on Facebook. There is a ton of information and lots of support on there.
Also, try to get oral steroids right away if it happens again in the other eye. It can stop the inflammation and possibly preserve some of your vision.