The state of Alaska has the longest width east to west, measuring 2,261 miles from its westernmost point to its easternmost point. The state of Hawaii is a close second, measuring 2,239 miles from east to west.

The state of Alaska has the longest width east to west, measuring 2,261 miles from its westernmost point to its easternmost point. The state of Hawaii is a close second, measuring 2,239 miles from east to west.