How far is Post Falls, ID from Iona, ID?
The driving distance from Post Falls, ID to Iona, ID is about 491.4 miles (790.9 km), with a travel time of about 08h 10m by car.
- The straight-line flight distance is about 377.5 miles (607.6 km).
- For a round trip, plan for roughly 16h 20m 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 10m.
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.
Driving Route Map
The map below follows the saved road route between Post Falls and Iona.
Turn-by-Turn Driving Directions
Step-by-step road directions between Post Falls and Iona.
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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
197.5 mi · 3 hr 5 min
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7
Take the exit slight right toward US 20 East: Airport, Idaho Falls
1580 ft · 39 sec
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8
Turn left onto Grandview Drive
916 ft · 30 sec · Grandview Drive
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9
Continue on Rigby Highway
2 mi · 3 min · Rigby Highway
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10
Take the exit slight right toward US 20 Business: Lewisville, Idaho Falls
1314 ft · 35 sec
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11
Turn right onto North 5th East
115 m · 15 sec · North 5th East
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12
Turn left onto East Iona Road
2 mi · 4 min · East Iona Road
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13
Enter the roundabout and take exit 2 toward East Iona Road
34 m · 2 sec · East Iona Road
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14
Exit the roundabout onto East Iona Road
2 mi · 3 min · East Iona Road
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15
Enter the roundabout and take exit 2 toward the route
34 m · 2 sec
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16
Exit the roundabout
42 m · 4 sec
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17
Continue on East Iona Road
2849 ft · 1 min · East Iona Road
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18
Turn left onto Olson Avenue
129 m · 19 sec · Olson Avenue
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19
Arrive at your destination
0 m · 1 sec · Olson Avenue
Car Route Details
A richer read on the saved driving route between Post Falls and Iona.
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.
Mostly Sunny leaving Post Falls and Sunny near Iona.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Post Falls to Iona?
The road trip is about 491.4 miles (790.9 km) and usually takes 08h 10m 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 245.4 miles from Post Falls and 246 miles from Iona.
How much longer is the road route than the straight-line distance?
The direct path is about 377.5 miles (607.6 km), while the road route adds roughly 113.9 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 $67.50 one way or $135.01 round trip. Estimated CO2 is about 154.1 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 Iona, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Post Falls and Sunny near Iona.
Flight Path Map
This map shows the direct air route between Post Falls and Iona. Straight-line distance: 377.58 mi (607.65 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 Iona
City in Idaho, United States
| Population | 2,354 |
| Coordinates | 43.5263000, -111.9330200 |
| Altitude | 1458 |
| Country | United States |
End: Iona (-111.93302, 43.5263)
Estimated Travel Time
Distance: 791 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 16h 22m |
| 40 mph (64.37 km/h) | 12h 17m |
| 50 mph (80.47 km/h) | 09h 49m |
| 60 mph (96.56 km/h) | 08h 11m |
| 70 mph (112.65 km/h) | 07h 01m |
| 80 mph (129 km/h) | 06h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $67.50 | $135.01 |
| Mid-grade | $4.23 | $73.37 | $146.73 |
| Premium | $4.55 | $78.88 | $157.76 |
| Diesel | $5.41 | $93.84 | $187.69 |
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 · 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.