How far is Iona, ID from Caldwell, ID?
The driving distance from Iona, ID to Caldwell, ID is about 313.5 miles (504.6 km), with a travel time of about 04h 33m by car.
- The straight-line flight distance is about 238 miles (383.1 km).
- For a round trip, plan for roughly 09h 06m 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 33m.
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 Twin Falls 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 Iona and Caldwell.
Turn-by-Turn Driving Directions
Step-by-step road directions between Iona and Caldwell.
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1
Start on Olson Avenue
129 m · 20 sec · Olson Avenue
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2
Turn right onto East Iona Road
2979 ft · 1 min · East Iona Road
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3
Enter the roundabout and take exit 2 toward East Iona Road
39 m · 2 sec · East Iona Road
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4
Exit the roundabout onto East Iona Road
2 mi · 3 min · East Iona Road
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5
Enter the roundabout and take exit 2 toward East Iona Road
33 m · 2 sec · East Iona Road
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6
Exit the roundabout onto East Iona Road
2 mi · 4 min · East Iona Road
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7
At the end of the road, turn right onto North 5th East
1031 ft · 27 sec · North 5th East
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8
Take the ramp left
1734 ft · 42 sec
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9
Merge slight left onto Rigby Highway
2 mi · 3 min · Rigby Highway
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10
Merge slight right onto Grandview Drive
575 ft · 14 sec · Grandview Drive
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11
Take the exit slight right toward I 15 South: Arco, Pocatello
1466 ft · 37 sec
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12
Merge slight left onto Veterans Memorial Highway
46.5 mi · 44 min · Veterans Memorial Highway
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13
Take the exit slight right toward I 86 West: Chubbuck, Twin Falls
1 km · 44 sec
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14
Continue straight
62.7 mi · 59 min
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15
Continue on Vietnam Veterans Memorial Highway
192.4 mi · 3 hr 6 min · Vietnam Veterans Memorial Highway
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16
Take the exit slight right toward US 20, US 26 East
1207 ft · 36 sec
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17
Turn left onto Franklin Road
2268 ft · 53 sec · Franklin Road
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18
Continue on North 21st Avenue
3239 ft · 1 min · North 21st Avenue
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19
Turn right onto Blaine Street
1.3 km · 2 min · Blaine Street
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20
Turn left onto South 10th Avenue
51 m · 10 sec · South 10th Avenue
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21
Turn left
21 m · 7 sec
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22
Turn right
24 m · 6 sec
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23
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Iona and Caldwell.
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
Continue on Vietnam Veterans Memorial Highway
192 mi · 03h 06m
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 Iona and Sunny near Caldwell.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Iona to Caldwell?
The road trip is about 313.5 miles (504.6 km) and usually takes 04h 33m 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?
Hansen is a useful midpoint, sitting about 155.7 miles from Iona and 157.8 miles from Caldwell.
How much longer is the road route than the straight-line distance?
The direct path is about 238 miles (383.1 km), while the road route adds roughly 75.5 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 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 7:54 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $43.06 one way or $86.11 round trip. Estimated CO2 is about 98.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Iona and Sunny near Caldwell.
Stop Ideas Near Hansen
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 Hansen.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Iona and Caldwell. Straight-line distance: 238.06 mi (383.12 km).
#1 Iona
City in Idaho, United States
| Population | 2,354 |
| Coordinates | 43.5263000, -111.9330200 |
| Altitude | 1458 |
| Country | United States |
#2 Caldwell
The most populous city in Canyon County, Idaho.
| Population | 58,481 |
| Coordinates | 43.6629400, -116.6873600 |
| Altitude | 724 |
| Country | United States |
End: (-116.687278, 43.66289)
Estimated Travel Time
Distance: 505 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 26m |
| 40 mph (64.37 km/h) | 07h 50m |
| 50 mph (80.47 km/h) | 06h 16m |
| 60 mph (96.56 km/h) | 05h 13m |
| 70 mph (112.65 km/h) | 04h 28m |
| 80 mph (129 km/h) | 03h 54m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $43.06 | $86.11 |
| Mid-grade | $4.23 | $46.79 | $93.59 |
| Premium | $4.55 | $50.31 | $100.62 |
| Diesel | $5.41 | $59.86 | $119.71 |
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.