Is there a bus route?

Yes, Greyhound offers service, but it often requires multiple transfers and long durations.

How long is the drive?

The drive typically takes 8 to 9 hours depending on stops and traffic.

Are there direct flights?

Yes, United Airlines operates daily direct flights from Billings to Denver.

What is the best route?

Taking I-90 East to I-25 South is the standard and most reliable route.

It features high plains and mountain vistas, particularly as you approach Colorado.

Billings

Denver

Flight Driving

Billings to Denver

Updated: 28 May 2026

Traveling from Billings to Denver covers roughly 550 miles. You can drive south via I-90 and I-25, passing through Wyoming cities like Casper and Cheyenne. Alternatively, direct flights are available from Billings Logan International Airport to Denver International Airport. The drive takes approximately 8 to 9 hours. Flying significantly reduces travel time to about 90 minutes in the air.

Total Distance: 885 km driving distance, 720 km air distance.

Fastest Way

Flying from BIL to DEN is the fastest, taking under 2 hours total.

Cheapest Way

Driving is generally cheaper if traveling with multiple passengers.

Compare Billings to Denver Routes

	Flight Direct	Driving Direct
Duration	1 hour 30 mins	8 hours 30 mins
Avg Price	$200-$400	$80-$120 in fuel
Operator	United Airlines	Personal Vehicle
Route	BIL to DEN airport.	I-90 East to I-25 South.
Tip	Book at least three weeks in advance for the best fares.	Wind gusts in Wyoming can be extreme; keep a firm grip on the steering wheel.

Travel Tips

Wind Warning
Wyoming highways are notorious for high crosswinds; drive slowly if you have a high-profile vehicle.
Airport Parking
Use the economy lot at Billings Logan International for long-term parking savings.
Altitude Adjustment
Denver is at a high altitude; drink plenty of water to avoid dehydration.
Traffic Patterns
Avoid I-25 in Denver during morning and evening rush hours.
Rental Cars
If flying, book your rental car in advance at Denver International Airport.

Safety Tips

Winter Driving
I-25 through Wyoming can close during blizzards; check the Wyoming DOT website.
Emergency Supplies
Keep blankets and water in your car, as stretches of I-25 are very isolated.
Speed Enforcement
Speed limits are strictly enforced in small Wyoming towns along the interstate.
Vehicle Check
Ensure your tires are properly inflated for the long, high-speed drive.