The flights are always the most expensive thing. If you are looking at vacation based on school holidays then I would probably lean toward next March as you would have time to really look for cheaper flights/offers/ and book lower cost accomodation or look for FD etc. Trying to rush for Thanksgiving now seems like a tough job, although the decorations are beautiful. Maybe Christmas might be easier if you fly out or back on Xmas day. Just a thought. Also, I think there is still FD if you check in on Dec 20th. I have 2 teens, so believe me, cost wise, I feel your pain.