Is there a bus from Billings to Casper?

There is no direct daily bus service; private vehicle or rental car is recommended.

How long is the drive?

The drive takes approximately 4 hours.

Are there tolls on this route?

No, there are no toll roads between Billings and Casper.

What is the best highway to take?

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

Is the route mountainous?

The route passes through the foothills of the Bighorn Mountains but remains on major interstate highways.

Billings

Casper

Driving

Billings to Casper

Updated: 28 May 2026

The journey from Billings to Casper covers approximately 250 miles through the heart of the American West. You will primarily utilize I-90 East before transitioning to I-25 South at Buffalo, Wyoming. The drive typically takes 4 hours under normal traffic conditions. This route traverses the scenic Bighorn Mountain foothills, offering expansive views of the high plains. It is a straightforward drive that serves as a primary artery for regional commerce and tourism.

Total Distance: 402 km driving distance; 330 km straight-line air distance.

Fastest Way

Driving via I-90 and I-25 is the fastest option, taking 4 hours.

Cheapest Way

Driving your own vehicle is the most cost-effective method for this route.

Compare Billings to Casper Routes

Driving

Direct

Duration

4 hours

Avg Price

$40-$60 in fuel

Operator

Personal Vehicle

Route

I-90 East to Buffalo, then I-25 South to Casper.

Stop in Buffalo for a quick lunch at a local diner to break up the drive.

Travel Tips

Fuel Up
Fill your tank in Billings or Buffalo, as stretches between towns can be desolate.
Check Weather
Wyoming winds can be extreme; check the road reports before departing.
Wildlife Awareness
Watch for deer and antelope crossing the highway, especially at dawn and dusk.
Cell Service
Expect intermittent cell service in the remote areas between Sheridan and Casper.
Rest Stops
Utilize the official Wyoming rest areas for safe breaks along the interstate.

Safety Tips

Winter Driving
Carry tire chains and an emergency kit if traveling between November and April.
Speed Limits
Adhere strictly to the 80 mph speed limit on I-25 to avoid heavy fines.
Emergency Supplies
Keep water and blankets in your car, as temperatures drop rapidly at night.
Headlights
Use headlights during the day to increase visibility to other drivers on the open plains.