Turn Times
IRL, a lot of airlines use far, far more than the minimum turn times, and the +20 minutes isn't really enough to make up for that. For example in AirwaySim, the minimum turn time on the 737-900 is 40 minutes, but they give you a higher chance of flight delay (and therefore worse rep and less pax) if you have a turn time under 70 minutes. So I suggest two things:
- Allow for the additional turn time to be increased by up to 150 minutes.
- Penalize airlines' reputation for having shorter turn times (this might not have to happen, since many airlines like SWA and Ryanair do fine with really small turn times). But i think looking into the penalty might be good.