Fedora Air: You fly for free in an experimental jet with parts being manufactured by a large corporation. Not everything works properly and sometimes your chair will break. The corporate backer doesn't really care since you aren't a paying cutomer.
Debian Air: It's a smooth flight on an old plane. You've got the option of having a basic chair right away or building it yourself. You've got the choice of an attractive stewardess that will offer you suggestions, or a plain stewardess that will do what you say quickly, while reminding you of things you need. It doesn't work on new routes and airports, but it's got a wide array of destinations that many other airlines don't bother with.
Ubuntu Air: Uses the newer planes with a new paint job from Debian Air, which still experience a bit of turbulence. It's the busiest airport and is funded by a millionaire who used to work at Debian Air. You have a choice of an ditsy blond stewardess who just brings you what you ask for, or stewardesses just like Debian air had, but there are a lot more annoying teenagers on board.
Slackware Air: Gives you a nice, comfortable seat, but there's not a full time stewardess and she makes you get all of the parts yourself if you want to make changes. Doesn't utilize the turbo jets on newer airplanes, but it's fast enough that most passengers don't complain.