Driving Distance: Seattle, WA to Hamilton, MT

The driving distance from Seattle, Washington to Hamilton, Montana is approximately:

• 680 miles
• 1,094 kilometers

Typical drive time: 10.5–11.5 hours via I-90 E (through Spokane, Coeur d'Alene, Missoula). Mountain passes and weather (especially winter) can add significant time. Plan for an overnight stop or two drivers.