The drive from Boulder City to Seattle is approximately 1,800 kilometers. You will take I-11 North to I-15 North, then transition to I-84 West through Idaho and Oregon to reach Seattle. This journey typically takes 18 to 20 hours. It is a long but beautiful route through the Pacific Northwest.
Total Distance: 1,800 km driving, 1,500 km air distance.
This is a multi-day drive; plan for overnight stops.
Summer for the best weather in Seattle.