How far is Greeley, CO from Thornton, CO?
The driving distance from Greeley, CO to Thornton, CO is about 54.3 miles (87.4 km), with a travel time of about 00h 59m by car.
- The straight-line flight distance is about 40.8 miles (65.7 km).
- For a round trip, plan for roughly 01h 59m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 59m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Town in Weld County, Colorado, United States
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 Greeley and Thornton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Greeley and Thornton.
-
1
Start on 19th Avenue
80 m · 19 sec · 19th Avenue
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2
Turn left onto 9th Street
1947 ft · 38 sec · 9th Street
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3
Continue on 10th Street
9 mi · 15 min · 10th Street
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4
Merge slight left onto Highway 34
5 mi · 8 min · Highway 34
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5
Continue on East Eisenhower Boulevard
1 mi · 2 min · East Eisenhower Boulevard
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6
Take the exit slight right toward I 25 South: Denver
1453 ft · 36 sec
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7
Merge slight left onto Dwight D. Eisenhower Highway
29.5 mi · 30 min · Dwight D. Eisenhower Highway
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8
Continue on North Valley Highway
3187 ft · 36 sec · North Valley Highway
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9
Keep slight right to continue on North Valley Highway
7 mi · 8 min · North Valley Highway
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10
Take the exit slight right toward Thornton Parkway
1181 ft · 23 sec
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11
Keep slight left to continue on Thornton Parkway East
35 m · 5 sec
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12
Turn left onto Thornton Parkway
1.6 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 Greeley 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.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
29.5 mi · 00h 30m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny leaving Greeley and Sunny near Thornton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Greeley to Thornton?
The road trip is about 54.3 miles (87.4 km) and usually takes 00h 59m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Mead is a useful midpoint, sitting about 27.2 miles from Greeley and 27.2 miles from Thornton.
How much longer is the road route than the straight-line distance?
The direct path is about 40.8 miles (65.7 km), while the road route adds roughly 13.5 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 4:30 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.10 one way or $14.20 round trip. Estimated CO2 is about 17.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Greeley and Sunny near Thornton.
Stop Ideas Near Mead
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old Town Hall
Town of Frederick
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Mead.
Longmont, Colorado
Boulder, Colorado
Fort Collins, Colorado
Union Station
Flight Path Map
This map shows the direct air route between Greeley and Thornton. Straight-line distance: 40.8 mi (65.66 km).
#1 Greeley
The third most populous city in Weld County, Colorado.
| Population | 108,958 |
| Coordinates | 40.4233100, -104.7091300 |
| Altitude | 1425 |
| 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: 87 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 48m |
| 40 mph (64.37 km/h) | 01h 21m |
| 50 mph (80.47 km/h) | 01h 05m |
| 60 mph (96.56 km/h) | 00h 54m |
| 70 mph (112.65 km/h) | 00h 46m |
| 80 mph (129 km/h) | 00h 40m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $7.10 | $14.20 |
| Mid-grade | $4.08 | $7.84 | $15.68 |
| Premium | $4.39 | $8.43 | $16.86 |
| Diesel | $4.74 | $9.10 | $18.19 |
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.