Also to know is, does USPS deliver by plane or truck?
Ground parcels are transported by truck between all destinations except those outside the 48 contiguous states. USPS contracts with private carriers to transport mail. Trucks and planes operate on regular schedules.
Subsequently, question is, how does USPS shipping work? A postal carrier collects your letter from the box along with the rest of the mail and takes it to the post office. There, all of the mail is placed on a truck and taken to a mail processing plant. At the mail processing plant, machines separate mail by shape and size.
Regarding this, which airlines does USPS use?
The USPS said that the airlines awarded contracts are: American Airlines; American Trans Air; Continental Airlines; JetBlue Airways; Midwest Airlines; Sun Country Airlines; and US Airways.
Do packages get flown?
Yes, US mail is often flown alongside passenger baggage and other cargo on commercial flights. Sometimes, carrying mail is a larger revenue generator than carrying people. When I follow the tracking on shipments, I often find that UPS and FedEx simply mail their packages.
