How far is Clifton, CO from Thornton, CO?
The driving distance from Clifton, CO to Thornton, CO is about 244.7 miles (393.8 km), with a travel time of about 03h 55m by car.
- The straight-line flight distance is about 193 miles (310.6 km).
- For a round trip, plan for roughly 07h 51m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 55m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Location in Colorado, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Clifton and Thornton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Clifton and Thornton.
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1
Start on F Road
108 m · 10 sec · F Road
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2
Enter the roundabout and take exit 2 toward F Road
24 m · 1 sec · F Road
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3
Exit the roundabout onto F Road
637 ft · 18 sec · F Road
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4
Turn sharp right
1.2 km · 1 min
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5
Keep slight right to continue on I 70 East: Denver
233.3 mi · 4 hr 22 min
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6
Keep slight left to continue on Heartland Expressway
5.1 mi · 6 min · Heartland Expressway
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7
Take the exit slight right toward I 25: Fort Collins, Colorado Springs
1098 ft · 21 sec
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8
Keep slight left to continue on I 25 North: Fort Collins
1.4 mi · 3 min
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9
Merge slight left onto North Valley Highway
1.4 km · 1 min · North Valley Highway
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10
Keep slight right to continue on North Valley Highway
1.3 mi · 2 min · North Valley Highway
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11
Take the exit slight right toward Thornton Parkway
2280 ft · 43 sec
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12
Turn right onto Thornton Parkway
1.4 km · 2 min · Thornton Parkway
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13
Turn right onto Dorothy Boulevard
1077 ft · 51 sec · Dorothy Boulevard
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14
Turn right
36 m · 9 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Clifton and Thornton.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 70 East
Keep slight right to continue on I 70 East: Denver
233 mi · 04h 22m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Clifton and Sunny near Thornton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Clifton to Thornton?
The road trip is about 244.7 miles (393.8 km) and usually takes 03h 55m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Edwards is a useful midpoint, sitting about 122.2 miles from Clifton and 122.5 miles from Thornton.
How much longer is the road route than the straight-line distance?
The direct path is about 193 miles (310.6 km), while the road route adds roughly 51.7 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 9:08 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $31.95 one way or $63.90 round trip. Estimated CO2 is about 76.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Clifton and Sunny near Thornton.
Stop Ideas Near Edwards
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 Edwards.
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Flight Path Map
This map shows the direct air route between Clifton and Thornton. Straight-line distance: 193.01 mi (310.62 km).
#1 Clifton
Clifton is a place in Colorado, United States.
| Population | 0 |
| Coordinates | 39.0919300, -108.4489800 |
| Altitude | 1440 |
| Country | United States |
#2 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
End: (-104.971859, 39.868064)
Estimated Travel Time
Distance: 394 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 09m |
| 40 mph (64.37 km/h) | 06h 07m |
| 50 mph (80.47 km/h) | 04h 53m |
| 60 mph (96.56 km/h) | 04h 04m |
| 70 mph (112.65 km/h) | 03h 29m |
| 80 mph (129 km/h) | 03h 03m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $31.95 | $63.90 |
| Mid-grade | $4.08 | $35.29 | $70.57 |
| Premium | $4.39 | $37.94 | $75.88 |
| Diesel | $4.74 | $40.93 | $81.86 |
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.