How far is Post Falls, ID from Saint Anthony, ID?
The driving distance from Post Falls, ID to Saint Anthony, ID is about 492.3 miles (792.2 km), with a travel time of about 08h 18m by car.
- The straight-line flight distance is about 362.5 miles (583.4 km).
- For a round trip, plan for roughly 16h 36m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM PDT.
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 08h 18m.
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 Lemhi County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Light Rain Likely then Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Post Falls and Saint Anthony.
Turn-by-Turn Driving Directions
Step-by-step road directions between Post Falls and Saint Anthony.
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1
Start on West 10th Avenue
872 ft · 40 sec · West 10th Avenue
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2
Turn right onto North Spokane Street
2114 ft · 1 min · North Spokane Street
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3
Turn left
2024 ft · 51 sec
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4
Merge slight left
285.1 mi · 4 hr 47 min
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5
Take the exit slight right toward I 15 South: Dillon, Idaho Falls
2694 ft · 1 min
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6
Merge slight left
173.6 mi · 2 hr 43 min
-
7
Take the exit slight right toward ID 33: Mud Lake, Rexburg
1111 ft · 29 sec
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8
Turn left onto East 1500 North
19.4 mi · 29 min · East 1500 North
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9
Take the ramp left toward US 20
2211 ft · 54 sec
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10
Merge slight left onto Yellowstone Highway
9.5 mi · 10 min · Yellowstone Highway
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11
Continue on Idaho Medal of Honor Highway
1.9 mi · 2 min · Idaho Medal of Honor Highway
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12
Take the exit slight right
2004 ft · 54 sec
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13
Turn left onto South Bridge Street
1529 ft · 37 sec · South Bridge Street
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14
Turn right onto East Main Street
27 m · 4 sec · East Main Street
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15
Arrive at your destination
0 m · 1 sec · East Main Street
Car Route Details
A richer read on the saved driving route between Post Falls and Saint Anthony.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
North Spokane Street
Merge slight left
285 mi · 04h 47m
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.
Rain leaving Post Falls and Light Rain Likely then Showers And Thunderstorms Likely near Saint Anthony.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Post Falls to Saint Anthony?
The road trip is about 492.3 miles (792.2 km) and usually takes 08h 18m 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?
Salmon is a useful midpoint, sitting about 245.8 miles from Post Falls and 246.4 miles from Saint Anthony.
How much longer is the road route than the straight-line distance?
The direct path is about 362.5 miles (583.4 km), while the road route adds roughly 129.8 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 PDT. 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 $67.62 one way or $135.24 round trip. Estimated CO2 is about 154.4 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Post Falls and Saint Anthony, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Rain around Post Falls and Light Rain Likely then Showers And Thunderstorms Likely near Saint Anthony.
Flight Path Map
This map shows the direct air route between Post Falls and Saint Anthony. Straight-line distance: 362.5 mi (583.38 km).
#1 Post Falls
City in Kootenai County, Idaho, United States
| Population | 36,250 |
| Coordinates | 47.7179600, -116.9515900 |
| Altitude | 665 |
| Country | United States |
#2 Saint Anthony
City in and county seat of Fremont County, Idaho, United States
| Population | 3,553 |
| Coordinates | 43.9663000, -111.6821800 |
| Altitude | 1514 |
| Country | United States |
End: Saint Anthony (-111.68218, 43.9663)
Estimated Travel Time
Distance: 792 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 16h 24m |
| 40 mph (64.37 km/h) | 12h 18m |
| 50 mph (80.47 km/h) | 09h 50m |
| 60 mph (96.56 km/h) | 08h 12m |
| 70 mph (112.65 km/h) | 07h 01m |
| 80 mph (129 km/h) | 06h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $67.62 | $135.24 |
| Mid-grade | $4.23 | $73.49 | $146.98 |
| Premium | $4.55 | $79.02 | $158.03 |
| Diesel | $5.41 | $94.01 | $188.01 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.