The drive from Denver to Casper takes approximately 4h 56min, covering 272 miles via I-70. Under normal conditions, expect to spend around $31 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 6–7+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic Estimate
🟢 Light traffic
4h 12m
🔵 Typical
4h 56min
🔴 Heavy traffic
7h 9m
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
Trip Details
Distance272 miles (437 km)
Drive Time4h 56min
RouteI-70
Best TimeWeekday mid-day
Fuel Costs
Gas (30 mpg)~9.1 gallons
Est. Cost$31
Route Tips: I-70
Crosses the Rocky Mountains with stunning scenery. Mountain passes can be challenging in winter.
This trip can typically be done on a single tank of gas.
Best Time to Drive from Denver to Casper
The best time to drive from Denver to Casper is weekday mid-day. Weekday mornings before 7 AM or evenings after 7 PM typically have the lightest traffic. Avoid Friday afternoons and Sunday evenings when possible.
🟢 Best:Weekday mid-day
🔴 Avoid:Rush hour (4-7 PM)
Driving vs Flying
🚗 Driving
4h 56min
~$31 gas
✈️ Flying
3h 3m
~$80–$150 flight
✈️ Flying is faster when you factor in airport time. Flight time is ~33 min but add ~2.5 hours for check-in, security, and boarding.
All Travel Options
🚗 Drive
4h 56min
~$31
🚌 Bus
6h 3m
~$22–$49
🚂 Train
4h 57m
~$33–$82
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:
📍 Laramie
📍 Cheyenne
📍 Fort Collins
Frequently Asked Questions
How long does it take to drive from Denver to Casper?
The drive from Denver to Casper takes approximately 4h 56min covering 272 miles via I-70. Actual time may vary based on traffic, weather, and road conditions.
How much does gas cost for Denver to Casper?
At 30 MPG and $3.50/gallon, expect to spend approximately $31 on gas for this 272-mile trip. You'll need about 9.1 gallons of fuel.
What is the best time to drive from Denver to Casper?
Weekday mid-day to avoid heavy traffic. Weekday mornings before 7 AM or evenings after 7 PM typically have less congestion.
Are there tolls on the Denver to Casper route?
There may be minor tolls (around $8) on parts of this route. Some sections have toll-free alternatives.
