How far is Lafayette, CO from Longmont, CO?
The driving distance from Lafayette, CO to Longmont, CO is about 12.7 miles (20.5 km), with a travel time of about 00h 22m by car.
- The straight-line flight distance is about 12 miles (19.3 km).
- For a round trip, plan for roughly 00h 44m 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 22m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in Boulder County, Colorado, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Lafayette and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lafayette and Longmont.
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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
11.5 mi · 16 min
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7
Turn right onto 5th Avenue
109 m · 20 sec · 5th Avenue
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8
Turn right onto Kimbark Street
52 m · 9 sec · Kimbark Street
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9
Turn right
57 m · 16 sec
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10
Turn right
33 m · 8 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 Longmont.
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.
US 287
Continue straight
11.5 mi · 00h 16m
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.
Mostly Sunny leaving Lafayette and Sunny near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lafayette to Longmont?
The road trip is about 12.7 miles (20.5 km) and usually takes 00h 22m 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?
Erie is a useful midpoint, sitting about 6.4 miles from Lafayette and 6.3 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 12 miles (19.3 km), while the road route adds roughly 0.7 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 7:46 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $1.66 one way or $3.33 round trip. Estimated CO2 is about 4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Lafayette and Sunny near Longmont.
Stop Ideas Near Erie
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old Town Hall
Broomfield City Council
Lafayette City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Erie.
Longmont, Colorado
Boulder, Colorado
Union Station
Denver (Bus Station), Colorado
Flight Path Map
This map shows the direct air route between Lafayette and Longmont. Straight-line distance: 12.01 mi (19.33 km).
#1 Lafayette
City in Colorado
| Population | 28,579 |
| Coordinates | 39.9936000, -105.0897100 |
| Altitude | 1588 |
| Country | United States |
#2 Longmont
The most populous city in Boulder County, Colorado.
| Population | 98,445 |
| Coordinates | 40.1672100, -105.1019300 |
| Altitude | 1519 |
| Country | United States |
End: (-105.101861, 40.16721)
Estimated Travel Time
Distance: 20 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 25m |
| 40 mph (64.37 km/h) | 00h 19m |
| 50 mph (80.47 km/h) | 00h 15m |
| 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 | $3.70 | $1.66 | $3.33 |
| Mid-grade | $4.08 | $1.84 | $3.68 |
| Premium | $4.39 | $1.98 | $3.95 |
| Diesel | $4.74 | $2.13 | $4.26 |
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 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.