Boise · the midpoint
Boise is the capital and most populous city in the U.S. state of Idaho. It is the county seat of Ada County. The population of the city was 235,685 at the 2020 census. Read more →
The fair place to meet is Boise, ID — the city closest to the midpoint of Salt Lake City and Seattle. From the farther side that’s about 8 hr 29 min of driving.
Recommended midpoint
Boise, ID
From Salt Lake City
6 hr 12 min
296 mi to Boise
From Seattle
8 hr 29 min
405 mi to Boise
Salt Lake City has the shorter trip; the split is off by about 2 hr 17 min. The alternatives below can even it out. Salt Lake City and Seattle are about 700 miles apart.
Salt Lake City and Seattle are about 700 miles apart by road. Split the difference and you arrive near Boise, the city closest to the halfway point between them. That puts roughly 6 hr 12 min of driving on the Salt Lake City side and 8 hr 29 min on the Seattle side — the fairest single meeting point among the cities near the middle.
That's a half-day drive from each side, so Boise suits an overnight or a weekend rather than a quick coffee — long enough to want a reason to stay, short enough to drive.
If Boise doesn't have what you're after, Portland and Sacramento are also close to the midpoint and worth a look — each keeps the drive reasonably balanced between Salt Lake City and Seattle.
Boise is the capital and most populous city in the U.S. state of Idaho. It is the county seat of Ada County. The population of the city was 235,685 at the 2020 census. Read more →
Salt Lake City, often shortened to Salt Lake or SLC, is the capital and most populous city of the U.S. state of Utah. It is the county seat of Salt Lake County, the most populous county in the state. Read more →
Seattle is the most populous city in the U.S. state of Washington and the Pacific Northwest region of North America. Read more →
City descriptions adapted from Wikipedia (CC BY-SA); photos via Wikimedia Commons, credited above.
Estimates use straight-line distance and typical road speeds; real drive times vary with route and traffic.