if youre in CASS youll have no problems jumpseating on Fedex, UPS, Atlas, etc. just as long as you know how to get to the cargo side and find each carriers building. they have websites to check flight times and you can also call their employee lines to list, but sometimes they dont pick up. youll travel in style most of the time on the widebodies, large seats etc, and sometimes theyll offer you some catering.