How far is Boise, ID from Iona, ID?
The driving distance from Boise, ID to Iona, ID is about 287.4 miles (462.5 km), with a travel time of about 04h 42m by car.
- The straight-line flight distance is about 213.8 miles (344.1 km).
- For a round trip, plan for roughly 09h 24m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 04h 42m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Jerome 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 Boise and Iona.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boise and Iona.
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1
Start on the route
36 m · 11 sec
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2
Turn right
80 m · 21 sec
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3
Turn right onto South 6th Street
849 ft · 39 sec · South 6th Street
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4
Turn left onto West Myrtle Street
1 km · 1 min · West Myrtle Street
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5
Turn right onto South Broadway Avenue
2.8 mi · 6 min · South Broadway Avenue
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6
Take the ramp left toward I 84 East
2049 ft · 46 sec · Idaho Medal of Honor Highway
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7
Continue on Vietnam Veterans Memorial Highway
166.5 mi · 2 hr 36 min · Vietnam Veterans Memorial Highway
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8
Continue straight
62.7 mi · 59 min
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9
Keep slight left to continue on Idaho Falls
3046 ft · 40 sec
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10
Merge slight right
46.3 mi · 44 min
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11
Take the exit slight right toward US 20 East, I 15: Rigby, West Yellowstone
1434 ft · 35 sec
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12
Continue on Rigby Highway
2 mi · 3 min · Rigby Highway
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13
Take the exit slight right toward US 20 Business: Lewisville, Idaho Falls
1314 ft · 35 sec
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14
Turn right onto North 5th East
115 m · 15 sec · North 5th East
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15
Turn left onto East Iona Road
2 mi · 4 min · East Iona Road
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16
Enter the roundabout and take exit 2 toward East Iona Road
34 m · 2 sec · East Iona Road
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17
Exit the roundabout onto East Iona Road
2 mi · 3 min · East Iona Road
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18
Enter the roundabout and take exit 2 toward the route
34 m · 2 sec
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19
Exit the roundabout
42 m · 4 sec
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20
Continue on East Iona Road
2849 ft · 1 min · East Iona Road
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21
Turn left onto Olson Avenue
129 m · 19 sec · Olson Avenue
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22
Arrive at your destination
0 m · 1 sec · Olson Avenue
Car Route Details
A richer read on the saved driving route between Boise and Iona.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Vietnam Veterans Memorial Highway
Continue on Vietnam Veterans Memorial Highway
166 mi · 02h 36m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Boise and Sunny near Iona.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boise to Iona?
The road trip is about 287.4 miles (462.5 km) and usually takes 04h 42m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Hazelton is a useful midpoint, sitting about 143.5 miles from Boise and 143.9 miles from Iona.
How much longer is the road route than the straight-line distance?
The direct path is about 213.8 miles (344.1 km), while the road route adds roughly 73.6 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 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 7:36 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $39.48 one way or $78.95 round trip. Estimated CO2 is about 90.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Boise and Sunny near Iona.
Stop Ideas Near Hazelton
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 Hazelton.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Boise and Iona. Straight-line distance: 213.84 mi (344.14 km).
#1 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| 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: 463 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 34m |
| 40 mph (64.37 km/h) | 07h 11m |
| 50 mph (80.47 km/h) | 05h 44m |
| 60 mph (96.56 km/h) | 04h 47m |
| 70 mph (112.65 km/h) | 04h 06m |
| 80 mph (129 km/h) | 03h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $39.48 | $78.95 |
| Mid-grade | $4.23 | $42.90 | $85.80 |
| Premium | $4.55 | $46.13 | $92.25 |
| Diesel | $5.41 | $54.88 | $109.76 |
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.