Is there a bus from Billings to Idaho Falls?

No, there is no direct bus service connecting these two cities.

How long is the drive?

The drive typically takes between 6 and 7 hours.

Are there tolls on this route?

No, there are no toll roads on the route from Billings to Idaho Falls.

Can I fly between these cities?

There are no direct commercial flights; connecting flights are inefficient and expensive.

Is the route safe in winter?

Mountain passes can be dangerous; winter travel requires 4WD and snow tires.

Billings

Idaho Falls

Driving

Billings to Idaho Falls

Updated: 28 May 2026

The journey from Billings to Idaho Falls spans approximately 400 miles through the heart of the Northern Rockies. Most travelers prefer driving via I-90 West and US-20, a route that takes roughly 6 to 7 hours depending on weather. You will traverse the scenic mountain passes near West Yellowstone, which offer stunning vistas but require caution. There is no direct train service between these two cities, making personal vehicles or rental cars the primary mode of transit. This route is highly popular for those connecting from Montana's largest city to the gateway of the Teton region.

Total Distance: 645 km driving distance; 380 km straight-line air distance.

Fastest Way

Driving is the only practical method, taking approximately 6 hours and 30 minutes.

Cheapest Way

Driving your own vehicle is the most cost-effective method, costing roughly $70 in fuel.

Compare Billings to Idaho Falls Routes

Driving

Direct

Duration

6 hours 30 mins

Avg Price

$60-$90 in fuel

Operator

Personal Vehicle

Route

I-90 W to US-191 S through West Yellowstone, then US-20 E.

Check the Montana and Idaho DOT websites for real-time pass closures before departing.

Travel Tips

Fuel Up
Gas stations are sparse between West Yellowstone and Idaho Falls; fill your tank in Bozeman.
Offline Maps
Cell service is non-existent in many mountain stretches; download offline maps before leaving Billings.
Wildlife Awareness
Elk and deer frequently cross US-191; drive slowly during dawn and dusk.
Weather Check
Even in summer, mountain temperatures drop significantly at night; pack a light jacket.
Snack Prep
Pack a cooler with water and snacks, as dining options are limited in the remote mountain passes.

Safety Tips

Mountain Driving
Use lower gears on steep descents to prevent brake overheating.
Emergency Kit
Carry a basic roadside emergency kit, including jumper cables and a flashlight.
Tire Pressure
Check your tire pressure before leaving, as altitude changes affect inflation levels.
Stay Alert
The monotony of the highway can cause fatigue; take breaks every two hours.