The US tapers from north to south. That distance varies from 2800 miles to about 2400 miles.
Alaska is part of the United States and is located on the west coast. It is the northernmost and westernmost state in the U.S.
Between the west coast of Europe and the east coast of the United States, it's about 3,000 miles.
The east coast of the US
The Appalachian mountains are closer to the east coast of the US. They run parallel to the coast and are located mainly in the eastern United States.
The sun is lower in the west coast. And the sun on the east coast is high in the sky
The Atlantic Ocean is on the east coast of the US. We do not know what country is 'yours' so cannot say which forms your west coast.
US route 20
East coast is The Atlantic Ocean. West coast in The Pacific Ocean.
Since parts of the east and west coasts of the US are roughly parallel, something parallel to one of them would be parallel to the other. The Appalachians are closer to the east coast than the west.
The east coast of the U.S. is three hours ahead of the west coast of the U.S.
Closer East but not on coast is mid east US just NE of TX
West Coast, East Coast, and Central US.