my 2cents - after my accident (I was in another far away state) I flew back home a few days later and had the worst(10) head aches pain of my life. This was very soon after the accident. I flew again 4 more times about a month later and ended up in the ER due to severy headache pain. I have not flown since - mostly due to my employment situation and those flights were close to the time of the injury but I do believe it exacerbated my sysmptoms. If its been a little while you will probably be ok except for the noise\chaos factor. Drink a lot of water as plane travel in general will dehydrate you.