How far is Caldwell, ID from Iona, ID?
The driving distance from Caldwell, ID to Iona, ID is about 311.4 miles (501.1 km), with a travel time of about 05h 07m by car.
- The straight-line flight distance is about 238 miles (383.1 km).
- For a round trip, plan for roughly 10h 14m 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 05h 07m.
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 Caldwell and Iona.
Turn-by-Turn Driving Directions
Step-by-step road directions between Caldwell and Iona.
-
1
Start on the route
28 m · 12 sec
-
2
Turn left onto Cleveland Boulevard
22 m · 4 sec · Cleveland Boulevard
-
3
Turn right
43 m · 13 sec
-
4
Turn right
46 m · 13 sec
-
5
Turn right onto South 10th Avenue
1.1 km · 2 min · South 10th Avenue
-
6
Take the ramp slight right
2822 ft · 1 min
-
7
Merge slight left onto Vietnam Veterans Memorial Highway
20.9 mi · 24 min · Vietnam Veterans Memorial Highway
-
8
Keep slight right to continue on Vietnam Veterans Memorial Highway
172.3 mi · 2 hr 43 min · Vietnam Veterans Memorial Highway
-
9
Continue straight
62.7 mi · 59 min
-
10
Keep slight left to continue on Idaho Falls
3046 ft · 40 sec
-
11
Merge slight right
46.3 mi · 44 min
-
12
Take the exit slight right toward US 20 East, I 15: Rigby, West Yellowstone
1434 ft · 35 sec
-
13
Continue on Rigby Highway
2 mi · 3 min · Rigby Highway
-
14
Take the exit slight right toward US 20 Business: Lewisville, Idaho Falls
1314 ft · 35 sec
-
15
Turn right onto North 5th East
115 m · 15 sec · North 5th East
-
16
Turn left onto East Iona Road
2 mi · 4 min · East Iona Road
-
17
Enter the roundabout and take exit 2 toward East Iona Road
34 m · 2 sec · East Iona Road
-
18
Exit the roundabout onto East Iona Road
2 mi · 3 min · East Iona Road
-
19
Enter the roundabout and take exit 2 toward the route
34 m · 2 sec
-
20
Exit the roundabout
42 m · 4 sec
-
21
Continue on East Iona Road
2849 ft · 1 min · East Iona Road
-
22
Turn left onto Olson Avenue
129 m · 19 sec · Olson Avenue
-
23
Arrive at your destination
0 m · 1 sec · Olson Avenue
Car Route Details
A richer read on the saved driving route between Caldwell and Iona.
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
Keep slight right to continue on Vietnam Veterans Memorial Highway
172 mi · 02h 43m
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 Caldwell and Sunny near Iona.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Caldwell to Iona?
The road trip is about 311.4 miles (501.1 km) and usually takes 05h 07m 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 155.5 miles from Caldwell and 155.9 miles from Iona.
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 73.4 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 6:46 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $42.78 one way or $85.57 round trip. Estimated CO2 is about 97.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Caldwell and Sunny near Iona.
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 Caldwell and Iona. Straight-line distance: 238.06 mi (383.12 km).
#1 Caldwell
The most populous city in Canyon County, Idaho.
| Population | 58,481 |
| Coordinates | 43.6629400, -116.6873600 |
| Altitude | 724 |
| 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: 501 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 22m |
| 40 mph (64.37 km/h) | 07h 47m |
| 50 mph (80.47 km/h) | 06h 13m |
| 60 mph (96.56 km/h) | 05h 11m |
| 70 mph (112.65 km/h) | 04h 26m |
| 80 mph (129 km/h) | 03h 53m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $42.78 | $85.57 |
| Mid-grade | $4.23 | $46.50 | $93.00 |
| Premium | $4.55 | $49.99 | $99.99 |
| Diesel | $5.41 | $59.48 | $118.96 |
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.