How far is Thornton, CO from Lafayette, CO?
The driving distance from Thornton, CO to Lafayette, CO is about 16.4 miles (26.4 km), with a travel time of about 00h 25m by car.
- The straight-line flight distance is about 10.7 miles (17.2 km).
- For a round trip, plan for roughly 00h 51m 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 25m.
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.
Census-designated place in Adams County, Colorado
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Thornton and Lafayette.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Lafayette.
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1
Start on the route
23 m · 12 sec
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2
Turn left onto Dorothy Boulevard
1165 ft · 59 sec · Dorothy Boulevard
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3
At the end of the road, turn left onto Thornton Parkway
1755 ft · 44 sec · Thornton Parkway
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4
Turn right onto Washington Street
1.6 km · 2 min · Washington Street
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5
Turn left onto East 104th Avenue
2512 ft · 57 sec · East 104th Avenue
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6
Take the ramp slight right toward I 25 North
1401 ft · 26 sec
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7
Merge slight left onto North Valley Highway
1.1 mi · 1 min · North Valley Highway
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8
Keep slight right to continue on North Valley Highway
5.3 mi · 6 min · North Valley Highway
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9
Continue on Dwight D. Eisenhower Highway
1.1 mi · 1 min · Dwight D. Eisenhower Highway
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10
Take the exit slight right toward CO 7: Lafayette, Brighton
1194 ft · 29 sec
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11
Keep slight left to continue on CO 7: Lafayette, Brighton
69 m · 8 sec
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12
Turn left
2.3 mi · 3 min
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13
Continue straight
159 m · 8 sec
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14
Continue straight
1.5 mi · 2 min
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15
Continue on East Baseline Road
1.9 mi · 4 min · East Baseline Road
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16
Turn left onto North Harrison Avenue
2365 ft · 2 min · North Harrison Avenue
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17
Turn right
24 m · 13 sec
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18
Turn sharp right
28 m · 7 sec
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19
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Thornton and Lafayette.
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.
North Valley Highway
Keep slight right to continue on North Valley Highway
5.28 mi · 00h 06m
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 then Slight Chance Rain Showers leaving Thornton and Mostly Sunny then Slight Chance Rain Showers near Lafayette.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Lafayette?
The road trip is about 16.4 miles (26.4 km) and usually takes 00h 25m 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?
Todd Creek is a useful midpoint, sitting about 8.2 miles from Thornton and 8.2 miles from Lafayette.
How much longer is the road route than the straight-line distance?
The direct path is about 10.7 miles (17.2 km), while the road route adds roughly 5.7 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 7:38 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.14 one way or $4.29 round trip. Estimated CO2 is about 5.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Thornton and Mostly Sunny then Slight Chance Rain Showers near Lafayette.
Stop Ideas Near Todd Creek
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Municipal Court Park
Broomfield City Council
Lafayette City Hall
Historic Brighton City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Todd Creek.
Denver (Bus Station), Colorado
Union Station
Longmont, Colorado
Boulder, Colorado
Flight Path Map
This map shows the direct air route between Thornton and Lafayette. Straight-line distance: 10.69 mi (17.2 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Lafayette
City in Colorado
| Population | 28,579 |
| Coordinates | 39.9936000, -105.0897100 |
| Altitude | 1588 |
| Country | United States |
End: Lafayette (-105.08971, 39.9936)
Estimated Travel Time
Distance: 26 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 32m |
| 40 mph (64.37 km/h) | 00h 24m |
| 50 mph (80.47 km/h) | 00h 19m |
| 60 mph (96.56 km/h) | 00h 16m |
| 70 mph (112.65 km/h) | 00h 14m |
| 80 mph (129 km/h) | 00h 12m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $2.14 | $4.29 |
| Mid-grade | $4.08 | $2.37 | $4.74 |
| Premium | $4.39 | $2.55 | $5.09 |
| Diesel | $4.74 | $2.75 | $5.49 |
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 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.