How far is Star, ID from Caldwell, ID?
The driving distance from Star, ID to Caldwell, ID is about 12.3 miles (19.8 km), with a travel time of about 00h 20m by car.
- The straight-line flight distance is about 9.9 miles (15.9 km).
- For a round trip, plan for roughly 00h 40m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM MDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 20m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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 Canyon County, Idaho
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers
Rain Showers
Driving Route Map
The map below follows the saved road route between Star and Caldwell.
Turn-by-Turn Driving Directions
Step-by-step road directions between Star and Caldwell.
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1
Start on West State Street
14 m · 6 sec · West State Street
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2
Turn right onto South Star Road
2 mi · 3 min · South Star Road
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3
Turn right onto West Chinden Boulevard
1.6 km · 1 min · West Chinden Boulevard
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4
Continue on Idaho Medal of Honor Highway
7 mi · 10 min · Idaho Medal of Honor Highway
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5
Continue on Franklin Road
1.1 km · 1 min · Franklin Road
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6
Continue on North 21st Avenue
3239 ft · 1 min · North 21st Avenue
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7
Turn right onto Blaine Street
1.3 km · 2 min · Blaine Street
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8
Turn left onto South 10th Avenue
51 m · 10 sec · South 10th Avenue
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9
Turn left
21 m · 7 sec
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10
Turn right
24 m · 6 sec
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11
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Star and Caldwell.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Idaho Medal of Honor Highway
Continue on Idaho Medal of Honor Highway
7.03 mi · 00h 10m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Rain Showers leaving Star and Rain Showers near Caldwell.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Star to Caldwell?
The road trip is about 12.3 miles (19.8 km) and usually takes 00h 20m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Middleton is a useful midpoint, sitting about 6.1 miles from Star and 6.3 miles from Caldwell.
How much longer is the road route than the straight-line distance?
The direct path is about 9.9 miles (15.9 km), while the road route adds roughly 2.4 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 7:00 AM to 7:00 PM MDT. If you want a more comfortable same-day return, try to leave by 7:50 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $1.71 one way or $3.43 round trip. Estimated CO2 is about 3.9 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers around Star and Rain Showers near Caldwell.
Stop Ideas Near Middleton
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 Middleton.
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Flight Path Map
This map shows the direct air route between Star and Caldwell. Straight-line distance: 9.9 mi (15.93 km).
#1 Star
City in Ada County, Idaho, United States
| Population | 10,532 |
| Coordinates | 43.6921100, -116.4934600 |
| Altitude | 753 |
| 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: 20 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 24m |
| 40 mph (64.37 km/h) | 00h 18m |
| 50 mph (80.47 km/h) | 00h 14m |
| 60 mph (96.56 km/h) | 00h 12m |
| 70 mph (112.65 km/h) | 00h 10m |
| 80 mph (129 km/h) | 00h 09m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $1.71 | $3.43 |
| Mid-grade | $4.23 | $1.86 | $3.72 |
| Premium | $4.55 | $2.00 | $4.00 |
| Diesel | $5.41 | $2.38 | $4.76 |
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 · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.