How far is Lafayette, CO from Boulder, CO?
The driving distance from Lafayette, CO to Boulder, CO is about 11.1 miles (17.8 km), with a travel time of about 00h 23m by car.
- The straight-line flight distance is about 9.7 miles (15.6 km).
- For a round trip, plan for roughly 00h 46m 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 23m.
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 Colorado
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Lafayette and Boulder.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lafayette and Boulder.
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1
Start on the route
63 m · 17 sec
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2
Turn right
15 m · 6 sec
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3
Turn right onto South Public Road
2430 ft · 2 min · South Public Road
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4
Turn left onto West Baseline Road
1 km · 2 min · West Baseline Road
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5
Turn right onto US 287, CO 7: US Highway 287 North
145 m · 10 sec
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6
Continue straight
1.5 km · 1 min
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7
Turn left onto Arapahoe Road
5.5 mi · 9 min · Arapahoe Road
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8
Continue on Arapahoe Avenue
3.4 mi · 7 min · Arapahoe Avenue
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9
Turn right onto 19th Street
44 m · 11 sec · 19th Street
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10
Turn left
27 m · 5 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 Lafayette and Boulder.
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.
Arapahoe Road
Turn left onto Arapahoe Road
5.5 mi · 00h 09m
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.
Sunny leaving Lafayette and Sunny near Boulder.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lafayette to Boulder?
The road trip is about 11.1 miles (17.8 km) and usually takes 00h 23m 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?
Louisville is a useful midpoint, sitting about 5.5 miles from Lafayette and 5.5 miles from Boulder.
How much longer is the road route than the straight-line distance?
The direct path is about 9.7 miles (15.6 km), while the road route adds roughly 1.4 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 7:44 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $1.44 one way or $2.88 round trip. Estimated CO2 is about 3.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Lafayette and Sunny near Boulder.
Stop Ideas Near Louisville
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Municipal Court Park
Broomfield City Council
Lafayette City Hall
Old Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Louisville.
Boulder, Colorado
Longmont, Colorado
Union Station
Denver (Bus Station), Colorado
Flight Path Map
This map shows the direct air route between Lafayette and Boulder. Straight-line distance: 9.69 mi (15.59 km).
#1 Lafayette
City in Colorado
| Population | 28,579 |
| Coordinates | 39.9936000, -105.0897100 |
| Altitude | 1588 |
| Country | United States |
#2 Boulder
The most populous city in Boulder County, Colorado.
| Population | 107,645 |
| Coordinates | 40.0149900, -105.2705500 |
| Altitude | 1624 |
| Country | United States |
End: (-105.27055, 40.014996)
Estimated Travel Time
Distance: 18 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 22m |
| 40 mph (64.37 km/h) | 00h 16m |
| 50 mph (80.47 km/h) | 00h 13m |
| 60 mph (96.56 km/h) | 00h 11m |
| 70 mph (112.65 km/h) | 00h 09m |
| 80 mph (129 km/h) | 00h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $1.44 | $2.88 |
| Mid-grade | $4.08 | $1.59 | $3.19 |
| Premium | $4.39 | $1.71 | $3.42 |
| Diesel | $4.74 | $1.85 | $3.69 |
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 Colorado · Apr 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.