get a copy of each carrier's timetable's from their website... electronic timetables from CO, NW/KLM offer this function...

also, you can use the PDA versions... just put in the origin and leave the destinations blank... virtually all carriers use the same PDA software (AA, AS, HP, CO, UA, DL, etc)... NW uses avantgo...

you will however, need to do this BY carrier, not en masse... this will also show 1-stop, same flight# segments...

best I can do for you...