US.
But UPS does operate internationally, as does FedEx, and DHL. I'd assume their operations/methodologies would be similar, as it's done to ship at the lowest cost. It would depend on location and transportation infrastructure, but it usually started on rail, went through a sorting facility (aka Hub), then to truck or air, depending on how it was contracted (i.e. ground, next day,...).
The freight portion relied on rail for most, if not all of it's journey, given the weight and/or size may be too big/heavy for any other means.
It depends on how the routes go. Sometimes it does.
Ground may include multiple truck runs and sort facilities before it hits the last stop (local sort), on to a van, and taken to the owners front door.
Air can be similar to ground as well. Multiple flights and sorts before it makes it to the final facility, where it gets loaded to a van, and dropped off to the recipient.
It can get a bit confusing, as it may not take a direct path. But it is designed to keep the avg. shipping cost down by sharing the loads with as much as possible, rather than running partially full trucks or flights. If they're not loaded, then it's costing them more fuel per unit weight, and more man power and equipemnt costs as well, given there's likely to be more unfull loads being moved.
Ground for example, they'll even hold trucks to fill them before sending them on their way (allow the driver to leave), or they don't move daily. It just depends on the location.
i see, that makes sense actually
thanks for the clarification (dont suppose you could pull some string and get the computer air dropped to my door could you, im in all day