I am wondering if anyone has ever tried to run an airline where you don't schedule specific flights at specific times? For example, an airline would sell you a ticket to transport you from point A to point B, on a certain day, with departure after a certain time, and arrival before another. Then, depending on the actual loads, dynamically allocate aircraft to fly specific routes, as needed. Whereas today, a routing between YVR and ATL might be on three separate planes (through SEA and DEN), the # of tickets sold between those two cities might justify a single CRJ making the jump with a fueling stop in Minneapolis. Another day, the best routing would be use an A319. Other days, not even a direct flight at all. Aside from some of the obvious logistical problems about scheduling ground crews, could it work? Obviously airlines with the A320 family planes practice a bit of this already by swapping 319/320s as demand warrants, but what about at a much larger scale? Matthew