As a long time UPSer,
if you want to send small packages, you can send to Post Office for cheaper shipping. If you want to send medium to big box UPS would take them, and the ground transit is also cheaper, since you live in East, and ship to Oregon, they would load in a 18 wheeler trailer to Chicago where they have a large UPS location to put trailers on freight train to head west. I know Fed Ex charges higher.
Also don't forget about the fuel surcharge which add up to cost to ship.
Post Office Price calculator:
Postage Price Calculator
UPS Calculate Time and Cost:
UPS Calculate Time and Cost
FedEx Rates and Transit times:
FedEx Rates and Transit Times
Remember, these are estimates and can't guarantee exact amount because it depends on location where you ship, if you ship at mail boxes etc, or shipping store, that costs more because they have to get a driver to come pick it up and take to center. Shipping at Post Office, at UPS customer counter, or FedEx, is more cheaper.
I hope all of this helps you compare the prices