Several years ago I saw a TV special that explained FedExs system for processing packages. Hard as it may seem to believe,
all packages, including overnight packages, regardless of their destination passed through their Memphis sorting facility. This means that if I in Seattle wanted to send a package to Portland, Oregon, it was first flown to Memphis, TN for sorting and then flown back to Portland.
I tried to check that concept out by doing a Google search and found this article:
http://www.my-esm.com/story/story/OEG20010510S0034
This paragraph way down in the text, verifies that this use to be the case even for a package originating in a New York city address and headed for another New York address; however, they have revised their system so the package doesn't now have to go by way of Memphis, TN.
Before, a package from New York going to New York left New York and went to Memphis and then went back. Now, if we have a package from the East Coast that's going to be delivered to an East Coast location, it never leaves the East Coast," Owens said. "That's a process that our planning engineers go through to ensure that those extra steps are avoided. If a package doesn't have to go on an airplane, the planning engineers have to make sure it doesn't get on an airplane."