How far is Caldwell, ID from Boise, ID?
The driving distance from Caldwell, ID to Boise, ID is about 27.8 miles (44.7 km), with a travel time of about 00h 31m by car.
- The straight-line flight distance is about 24.4 miles (39.3 km).
- For a round trip, plan for roughly 01h 02m 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 31m.
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.
The most populous city in Ada County, Idaho.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Caldwell and Boise.
Turn-by-Turn Driving Directions
Step-by-step road directions between Caldwell and Boise.
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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 left to continue on Boise Connector
4.7 mi · 6 min · Boise Connector
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9
Continue on West Myrtle Street
3102 ft · 2 min · West Myrtle Street
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10
Turn left onto South 5th Street
607 ft · 27 sec · South 5th Street
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11
Turn left onto West Front Street
643 ft · 19 sec · West Front Street
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12
Turn right
17 m · 4 sec
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13
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Caldwell and Boise.
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.
Vietnam Veterans Memorial Highway
Merge slight left onto Vietnam Veterans Memorial Highway
20.9 mi · 00h 24m
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.
Partly Sunny leaving Caldwell and Partly Sunny near Boise.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Caldwell to Boise?
The road trip is about 27.8 miles (44.7 km) and usually takes 00h 31m 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?
Meridian is a useful midpoint, sitting about 13.9 miles from Caldwell and 13.9 miles from Boise.
How much longer is the road route than the straight-line distance?
The direct path is about 24.4 miles (39.3 km), while the road route adds roughly 3.4 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 7:28 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.82 one way or $7.63 round trip. Estimated CO2 is about 8.7 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Caldwell and Partly Sunny near Boise.
Stop Ideas Near Meridian
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 Meridian.
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Flight Path Map
This map shows the direct air route between Caldwell and Boise. Straight-line distance: 24.44 mi (39.33 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 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| Country | United States |
End: (-116.203299, 43.613424)
Estimated Travel Time
Distance: 45 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 55m |
| 40 mph (64.37 km/h) | 00h 41m |
| 50 mph (80.47 km/h) | 00h 33m |
| 60 mph (96.56 km/h) | 00h 27m |
| 70 mph (112.65 km/h) | 00h 23m |
| 80 mph (129 km/h) | 00h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $3.82 | $7.63 |
| Mid-grade | $4.23 | $4.15 | $8.29 |
| Premium | $4.55 | $4.46 | $8.92 |
| Diesel | $5.41 | $5.30 | $10.61 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.