I have always wondered how the airlines “decide” how to do flight planning.
As an example, I looked up Amercian, Continental/United, and Southwest Airlines and their route from St. Louis, MO and Chicago, IL.
Each of those airlines fly 11 flights per day from St. Louis to Chicago. and 2 of the 3 fly 10 flights back to St. Louis from Chicago, and American flies 11.
That is not counting all the other airlines who have connecting flights thru Chicago to St. Louis, and such.
It’s hard to imagine that there could be enough people going back and forth between St. Louis and Chicago to fill 11 flights per day on 3 different airlines, much less all the other connecting flights. I have also checked other flights such as the daily flight between EWR and HNL, and this flight too is usually full with very few seats flying empty.
So, my question is, how do the airlines model how, when and where to fly their planes? Must be an interesting job to be sure.