via I-90
The drive from Casper to Salt Lake City takes approximately 7h 1min, covering 386 miles via I-90. Under normal conditions, expect to spend around $45 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 10–11+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Plan rest stops every 2-3 hours on longer drives. Check traffic conditions before departure and keep your tank above quarter-full.
This trip can typically be done on a single tank of gas.
For a long drive like Casper to Salt Lake City, 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.
✈️ Flying is faster when you factor in airport time. Flight time is ~46 min but add ~2.5 hours for check-in, security, and boarding.
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Popular cities along the route for rest, food, or fuel:
The journey from Casper to Salt Lake City stretches 386 miles along I-90 and typically takes 7h 1min to complete. At today's fuel prices, expect to spend around $45 on gas. Departing during late evening (8-10 pm) gives you the best chance of avoiding congestion along the way.
The 386-mile distance makes this a proper road trip. Start with a full tank, grab a coffee for the road, and enjoy the changing scenery as you make your way from Casper to Salt Lake City. Popular stopping points include Jackson Hole, Steamboat Springs, Grand Teton — great options for grabbing a meal, fueling up, or stretching your legs.