There are three in the lower 48, going from north to south they are Washington, Oregon and California. But you may also include Alaska since it borders the Pacific Ocean . . . and then there is...
That depends on where you are measuring from. For instance, from Jacksonville, FL to San Diego, CA it's only around 2100 miles. But from Miami, FL to Neah Bay, WA it's almost 2900 miles. Try Google's...