Anyone know where "reasonable" time to get to the airport can be found in writing? Crew Scheduling tells me that their computers are programmed for 120 Minutes to wheels up, instead of show time at the airport.

Every day we are seeing equipment substitutions in ATL where other fleets are called on to perform MD88 rotations. The 06:30 show times are covered with 05:00 short calls at anywhere from 10:00 the prior day to 03:30 the day of the rotation. CS does not notify the pilot due to rest and the fact these are assigned at an odd ball time makes it difficult to anticipate when to check the schedule. In any event, the computer does the assigning and if it is programmed to 2 hours to wheels up - that's a change, isn't it?

Just curious. Everyone does the best they can to avoid late start flights, but taking an hour away during rush hour might not be the optimal solution for CS, or the pilots.