How far is Caldwell, ID from Saint Anthony, ID?
The driving distance from Caldwell, ID to Saint Anthony, ID is about 342.7 miles (551.5 km), with a travel time of about 05h 37m by car.
- The straight-line flight distance is about 250.4 miles (402.9 km).
- For a round trip, plan for roughly 11h 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 37m.
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.
Partly Sunny
Mostly Sunny then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Caldwell and Saint Anthony.
Turn-by-Turn Driving Directions
Step-by-step road directions between Caldwell and Saint Anthony.
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1
Start on the route
28 m · 12 sec
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2
Turn left onto Cleveland Boulevard
22 m · 4 sec · Cleveland Boulevard
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3
Turn right
43 m · 13 sec
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4
Turn right
46 m · 13 sec
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5
Turn right onto South 10th Avenue
1.1 km · 2 min · South 10th Avenue
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6
Take the ramp slight right
2822 ft · 1 min
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7
Merge slight left onto Vietnam Veterans Memorial Highway
20.9 mi · 24 min · Vietnam Veterans Memorial Highway
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8
Keep slight right to continue on Vietnam Veterans Memorial Highway
172.3 mi · 2 hr 43 min · Vietnam Veterans Memorial Highway
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9
Continue straight
62.7 mi · 59 min
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10
Keep slight left to continue on Idaho Falls
3046 ft · 40 sec
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11
Merge slight right
46.3 mi · 44 min
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12
Take the exit slight right toward US 20 East, I 15: Rigby, West Yellowstone
1434 ft · 35 sec
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13
Continue on Rigby Highway
3.1 mi · 4 min · Rigby Highway
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14
Continue on Idaho Medal of Honor Highway
15.4 mi · 16 min · Idaho Medal of Honor Highway
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15
Continue on Yellowstone Highway
17.2 mi · 18 min · Yellowstone Highway
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16
Continue on Idaho Medal of Honor Highway
1.9 mi · 2 min · Idaho Medal of Honor Highway
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17
Take the exit slight right
2004 ft · 54 sec
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18
Turn left onto South Bridge Street
1529 ft · 37 sec · South Bridge Street
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19
Turn right onto East Main Street
27 m · 4 sec · East Main Street
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20
Arrive at your destination
0 m · 1 sec · East Main Street
Car Route Details
A richer read on the saved driving route between Caldwell and Saint Anthony.
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.
Partly Sunny leaving Caldwell and Mostly Sunny then Chance Showers And Thunderstorms near Saint Anthony.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Caldwell to Saint Anthony?
The road trip is about 342.7 miles (551.5 km) and usually takes 05h 37m 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 171.1 miles from Caldwell and 171.6 miles from Saint Anthony.
How much longer is the road route than the straight-line distance?
The direct path is about 250.4 miles (402.9 km), while the road route adds roughly 92.3 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 5:46 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $47.07 one way or $94.13 round trip. Estimated CO2 is about 107.4 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Caldwell and Mostly Sunny then Chance Showers And Thunderstorms near Saint Anthony.
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 Caldwell and Saint Anthony. Straight-line distance: 250.38 mi (402.95 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 Saint Anthony
City in and county seat of Fremont County, Idaho, United States
| Population | 3,553 |
| Coordinates | 43.9663000, -111.6821800 |
| Altitude | 1514 |
| Country | United States |
End: Saint Anthony (-111.68218, 43.9663)
Estimated Travel Time
Distance: 552 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 25m |
| 40 mph (64.37 km/h) | 08h 34m |
| 50 mph (80.47 km/h) | 06h 51m |
| 60 mph (96.56 km/h) | 05h 42m |
| 70 mph (112.65 km/h) | 04h 53m |
| 80 mph (129 km/h) | 04h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $47.07 | $94.13 |
| Mid-grade | $4.23 | $51.15 | $102.31 |
| Premium | $4.55 | $55.00 | $109.99 |
| Diesel | $5.41 | $65.43 | $130.86 |
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 26, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.