1) The number of fans has little effect on the airline's schedules. Unless you've never flown before, you know the flights are scheduled long in advance.
2) As a resident of west Michigan, I can attest that the horrendous blizzard covering the Midwest this weekend probably had something to do with it. Remember why Ron Rivera was late getting to Dallas?
3) Assuming each blue plane represents the actual location of a flight at that time instead of its intended destination (since several appear to be in the Atlantic Ocean), it looks like there are still PLENTY of flights headed to the midwest.
It's a cute-ish graphic, but not worth taking seriously.