Does first class mail travel by plane or truck?
Does first class mail travel by plane or truck? Generally, Priority Mail, Priority Mail Express and First-Class Mail pieces will be shipped by air. However, these mail classes may also be shipped by ground depending on the originating and destination points—for example, if a destination is within driving distance.
Do packages go by plane?
Sometimes your boxes and shipments will soar 39,000 feet in the air. From the time the USPS first experimented with mail flight in 1911 to the present day, letters and parcels have been carried through the air to ensure speedy delivery for your recipients.