If this question interests you, doing a search for "airline turn around time statistics" is likely to take you to lots of interesting discoveries. As is common

If this question interests you, doing a search for "airline turn around time statistics" is likely to take you to lots of interesting discoveries. As is commonly the case when one looks at a giant industry and says "I could do this way better having thought about it for 30 seconds" this is a far more difficult problem to optimize than it appears on first glance.