How far is Thornton, CO from Carbondale, CO?
The driving distance from Thornton, CO to Carbondale, CO is about 177.8 miles (286.2 km), with a travel time of about 03h 36m by car.
- The straight-line flight distance is about 123.4 miles (198.6 km).
- For a round trip, plan for roughly 07h 12m 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 36m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Summit County, Colorado, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Slight Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Thornton and Carbondale.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Carbondale.
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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
1.6 km · 2 min · Thornton Parkway
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4
Turn left onto I 25 South: Colorado Springs
1973 ft · 40 sec
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5
Merge slight left onto North Valley Highway
1.2 mi · 2 min · North Valley Highway
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6
Keep slight right to continue on North Valley Highway
1.5 mi · 2 min · North Valley Highway
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7
Take the exit slight right toward I 76 West: Arvada, Grand Junction
1.5 km · 2 min
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8
Merge slight left onto Heartland Expressway
5.2 mi · 6 min · Heartland Expressway
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9
Merge slight left
153.2 mi · 2 hr 55 min
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10
Take the exit slight right toward CO 82 East: Glenwood Springs, Aspen
747 ft · 21 sec
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11
Continue on Laurel Street
119 m · 15 sec · Laurel Street
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12
Continue on Grand Avenue
1204 ft · 45 sec · Grand Avenue
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13
Turn right onto 8th Street
2084 ft · 49 sec · 8th Street
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14
At the end of the road, turn left onto Midland Avenue
1.6 mi · 3 min · Midland Avenue
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15
Enter the roundabout and take exit 2 toward 27th Street
54 m · 3 sec · 27th Street
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16
Exit the roundabout onto 27th Street
636 ft · 13 sec · 27th Street
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17
Enter the roundabout and take exit 2 toward 27th Street
26 m · 2 sec · 27th Street
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18
Exit the roundabout onto 27th Street
692 ft · 19 sec · 27th Street
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19
Turn right onto Glen Avenue
9.8 mi · 16 min · Glen Avenue
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20
Turn right
1.1 mi · 2 min
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21
Enter the roundabout and take exit 3 toward Main Street
68 m · 3 sec · Main Street
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22
Exit the roundabout onto Main Street
2385 ft · 53 sec · Main Street
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23
Turn left onto North 4th Street
610 ft · 27 sec · North 4th Street
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24
Arrive at your destination
0 m · 1 sec · Merrill Avenue
Car Route Details
A richer read on the saved driving route between Thornton and Carbondale.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Heartland Expressway
Merge slight left
153 mi · 02h 55m
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.
Mostly Sunny then Slight Chance Rain Showers leaving Thornton and Slight Chance Snow Showers near Carbondale.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Carbondale?
The road trip is about 177.8 miles (286.2 km) and usually takes 03h 36m 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?
Frisco is a useful midpoint, sitting about 88.8 miles from Thornton and 89 miles from Carbondale.
How much longer is the road route than the straight-line distance?
The direct path is about 123.4 miles (198.6 km), while the road route adds roughly 54.4 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 9:48 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.19 one way or $46.37 round trip. Estimated CO2 is about 55.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Thornton and Slight Chance Snow Showers near Carbondale.
Stop Ideas Near Frisco
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 Frisco.
Frisco, Colorado
Vail, Colorado
Fairplay, CO
Fraser – Winter Park
Flight Path Map
This map shows the direct air route between Thornton and Carbondale. Straight-line distance: 123.42 mi (198.62 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Carbondale
Town of the United States
| Population | 6,729 |
| Coordinates | 39.4022100, -107.2111600 |
| Altitude | 1881 |
| Country | United States |
End: Carbondale (-107.21116, 39.40221)
Estimated Travel Time
Distance: 286 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 55m |
| 40 mph (64.37 km/h) | 04h 26m |
| 50 mph (80.47 km/h) | 03h 33m |
| 60 mph (96.56 km/h) | 02h 57m |
| 70 mph (112.65 km/h) | 02h 32m |
| 80 mph (129 km/h) | 02h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $23.19 | $46.37 |
| Mid-grade | $4.08 | $25.61 | $51.21 |
| Premium | $4.39 | $27.53 | $55.06 |
| Diesel | $4.74 | $29.70 | $59.40 |
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.