FedEx Owns Memphis

Look at the intraday distribution of flights and delays for Memphis:

We see a pretty interesting pattern. Turns out the FedEx shipments control most of the flights out of Memphis which gives us this unique shape.

Other airports tend to slowly but surely build up delays over the course of the day as delays cascade onto each other.

In Memphis, FedEx clogs up the airport with its 3 daily shipouts.

That's it.