U could apply to one of the -121 airlines that fly charter. Some of them, like Atlas Air, basically only fly charter. There is also Miami Air, Pace Air, Southern, Omni, North American....and I'm sure a lot of other ones that I don't recall off the top of my head.

cliff
GRB
Note: I don't know which of them are hiring now.....most of those above are not hiring presently.