How far is Challis, ID from Post Falls, ID?
The driving distance from Challis, ID to Post Falls, ID is about 370.9 miles (596.9 km), with a travel time of about 06h 44m by car.
- The straight-line flight distance is about 257.4 miles (414.2 km).
- For a round trip, plan for roughly 13h 29m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 06h 44m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Idaho County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms then Chance Rain And Snow
Mostly Sunny
Driving Route Map
A saved road route is not available yet, so the map falls back to a straight-line overview.
Turn-by-Turn Driving Directions
Step-by-step road directions between Challis and Post Falls.
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Chance Showers And Thunderstorms then Chance Rain And Snow leaving Challis and Mostly Sunny near Post Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Challis to Post Falls?
The road trip is about 370.9 miles (596.9 km) and usually takes 06h 44m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Stites is a useful midpoint, sitting about 128.7 miles from Challis and 242.2 miles from Post Falls.
How much longer is the road route than the straight-line distance?
The direct path is about 257.4 miles (414.2 km), while the road route adds roughly 113.5 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $50.96 one way or $101.92 round trip. Estimated CO2 is about 116.3 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Challis and Post Falls, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms then Chance Rain And Snow around Challis and Mostly Sunny near Post Falls.
Stop Ideas Near Stites
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Stites.
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Flight Path Map
This map shows the direct air route between Challis and Post Falls. Straight-line distance: 257.38 mi (414.21 km).
#1 Challis
City in Custer County, Idaho, United States
| Population | 1,091 |
| Coordinates | 44.5046400, -114.2317300 |
| Altitude | 1601 |
| Country | United States |
#2 Post Falls
City in Kootenai County, Idaho, United States
| Population | 36,250 |
| Coordinates | 47.7179600, -116.9515900 |
| Altitude | 665 |
| Country | United States |
End: West 10th Avenue (-116.951612, 47.717931)
Estimated Travel Time
Distance: 597 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 21m |
| 40 mph (64.37 km/h) | 09h 16m |
| 50 mph (80.47 km/h) | 07h 25m |
| 60 mph (96.56 km/h) | 06h 10m |
| 70 mph (112.65 km/h) | 05h 17m |
| 80 mph (129 km/h) | 04h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $50.96 | $101.92 |
| Mid-grade | $4.23 | $55.38 | $110.77 |
| Premium | $4.55 | $59.55 | $119.09 |
| Diesel | $5.41 | $70.84 | $141.69 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Idaho · Apr 11, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.