Software Engineering
I went back to school part time at first to study Computer Science and Mathematics. The world runs on software and at the time, I was already pretty savvy.
I landed my first job as a developer before graduating this summer. Once graduating, it was refreshing to have lots of prospects and choose what I wanted. I currently work for a large company as a developer and enjoy it very much so far. Obviously, flying a cube might not be as enjoyable but I can walk around the office, home every night, a reliable lunch time, etc. I will admit that I do miss flying but am fortunate to have been able to fly at the airlines as long as I did.
If anyone is considering this route, I will answer any questions you may have.