How Long Is the Drive from Salt Lake City to Seattle?
The drive from Salt Lake City to Seattle takes approximately 12h 0min, covering 840 miles via I-80. Under normal conditions, expect to spend around $98 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 17–18+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic Estimate
🟢 Light traffic
10h 12m
🔵 Typical
12h 0min
🔴 Heavy traffic
17h 24m
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Trip Details
Distance840 miles (1351 km)
Drive Time12h 0min
RouteI-80
Best TimeMid-morning (9-11 AM)
Fuel Costs
Gas (30 mpg)~28.0 gallons
Est. Cost$98
Route Tips: I-80
Crosses the country through the northern states. Mountain passes in Wyoming and Utah can see winter closures.
You'll likely need 1 fuel stop along the way.
Best Time to Drive from Salt Lake City to Seattle
For a long drive like Salt Lake City to Seattle, plan to depart early in the morning. This lets you cover most of the distance before afternoon traffic builds up. Consider breaking the trip with a lunch stop midway.
🟢 Best:Mid-morning (9-11 AM)
🔴 Avoid:Rush hour (4-7 PM)
Driving vs Flying
🚗 Driving
12h 0min
~$98 gas
✈️ Flying
4h 11m
~$126–$294 flight
✈️ Flying is faster when you factor in airport time. Flight time is ~1h 41m but add ~2.5 hours for check-in, security, and boarding.
All Travel Options
🚗 Drive
12h 0min
~$98
🚌 Bus
18h 40m
~$67–$151
🚂 Train
15h 16m
~$101–$252
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Suggested Stops
Popular cities along the route for rest, food, or fuel:
📍 Boise
📍 Sun Valley
📍 Missoula
Frequently Asked Questions
How long does it take to drive from Salt Lake City to Seattle?
The drive from Salt Lake City to Seattle takes approximately 12h 0min covering 840 miles via I-80. Actual time may vary based on traffic, weather, and road conditions.
How much does gas cost for Salt Lake City to Seattle?
At 30 MPG and $3.50/gallon, expect to spend approximately $98 on gas for this 840-mile trip. You'll need about 28.0 gallons of fuel.
What is the best time to drive from Salt Lake City to Seattle?
Mid-morning (9-11 AM) to avoid heavy traffic. Weekday mornings before 7 AM or evenings after 7 PM typically have less congestion.
Are there tolls on the Salt Lake City to Seattle route?
Yes, expect approximately $25 in tolls along this route. Consider getting a Good To Go! transponder for faster toll payment.
