How far is Boise, ID from Post Falls, ID?
The driving distance from Boise, ID to Post Falls, ID is about 389.9 miles (627.5 km), with a travel time of about 07h 23m by car.
- The straight-line flight distance is about 285.9 miles (460.1 km).
- For a round trip, plan for roughly 14h 46m 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 07h 23m.
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 Nez Perce County, Idaho, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Boise and Post Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boise and Post Falls.
-
1
Start on the route
36 m · 11 sec
-
2
Turn right
80 m · 21 sec
-
3
Turn right onto South 6th Street
57 m · 11 sec · South 6th Street
-
4
Turn right onto West Front Street
2663 ft · 1 min · West Front Street
-
5
Continue on Boise Connector
4.8 mi · 6 min · Boise Connector
-
6
Merge slight left onto Vietnam Veterans Memorial Highway
237.2 mi · 4 hr 15 min · Vietnam Veterans Memorial Highway
-
7
Take the exit slight right toward US 395 North: Stanfield, Hermiston
1706 ft · 42 sec
-
8
Continue on Umatilla-Stanfield Highway
1.2 mi · 1 min · Umatilla-Stanfield Highway
-
9
Continue on South Main Street
2 mi · 2 min · South Main Street
-
10
Continue on Umatilla-Stanfield Highway
3.2 mi · 4 min · Umatilla-Stanfield Highway
-
11
Turn right onto Southeast 4th Street
1.6 mi · 3 min · Southeast 4th Street
-
12
Turn left onto East Theater Lane
1368 ft · 42 sec · East Theater Lane
-
13
Turn right onto North 1st Street
2864 ft · 39 sec · North 1st Street
-
14
Continue on Umatilla-Stanfield Highway
3.8 mi · 4 min · Umatilla-Stanfield Highway
-
15
Turn left onto Columbia River Highway
1.1 km · 49 sec · Columbia River Highway
-
16
Take the exit right toward I 82 West, US 395 North: Kennewick, Yakima
1130 ft · 28 sec
-
17
Merge slight left onto McNary Highway
20.4 mi · 22 min · McNary Highway
-
18
Keep slight right to continue on Lewis and Clark Trail Highway
3.3 mi · 5 min · Lewis and Clark Trail Highway
-
19
Continue on South US 395
1.1 mi · 2 min · South US 395
-
20
Continue on Lewis and Clark Trail
4.9 mi · 7 min · Lewis and Clark Trail
-
21
Take the exit slight right toward US 395 north, SR 397 south (Oregon Street): Spokane, Finley
859 ft · 21 sec
-
22
Keep slight left to continue on US 395
1416 ft · 35 sec
-
23
Keep slight right to continue on US 395 North: Spokane
130.7 mi · 2 hr 21 min
-
24
Merge slight right
25.9 mi · 30 min
-
25
Take the exit slight right toward I 90 Business
1895 ft · 48 sec
-
26
Turn left onto North Spokane Street
2151 ft · 1 min · North Spokane Street
-
27
Turn left onto West 10th Avenue
872 ft · 38 sec · West 10th Avenue
-
28
Arrive at your destination
0 m · 1 sec · West 10th Avenue
Car Route Details
A richer read on the saved driving route between Boise and Post Falls.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Vietnam Veterans Memorial Highway
Merge slight left onto Vietnam Veterans Memorial Highway
237 mi · 04h 15m
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.
Sunny leaving Boise 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 Boise to Post Falls?
The road trip is about 389.9 miles (627.5 km) and usually takes 07h 23m 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?
Lewiston is a useful midpoint, sitting about 221.8 miles from Boise and 168.1 miles from Post Falls.
How much longer is the road route than the straight-line distance?
The direct path is about 285.9 miles (460.1 km), while the road route adds roughly 104 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 $53.57 one way or $107.14 round trip. Estimated CO2 is about 122.3 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Boise and Post Falls, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Sunny around Boise and Mostly Sunny near Post Falls.
Stop Ideas Near Lewiston
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 Lewiston.
Lewiston, Idaho
Moscow, Idaho
Pullman, Washington
Colfax, Washington
Flight Path Map
This map shows the direct air route between Boise and Post Falls. Straight-line distance: 285.88 mi (460.08 km).
#1 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| 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: 628 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 59m |
| 40 mph (64.37 km/h) | 09h 44m |
| 50 mph (80.47 km/h) | 07h 47m |
| 60 mph (96.56 km/h) | 06h 29m |
| 70 mph (112.65 km/h) | 05h 34m |
| 80 mph (129 km/h) | 04h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $53.57 | $107.14 |
| Mid-grade | $4.23 | $58.22 | $116.44 |
| Premium | $4.55 | $62.59 | $125.19 |
| Diesel | $5.41 | $74.47 | $148.94 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.