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.
Trip Tools

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.

Reverse Route
Quick Snapshot
Road
177.82 mi
03h 36m
Flight
123.42 mi
198.62 km direct

This drive is better planned with a longer stop or an overnight stay.

Learn Distance

Choose another destination from Thornton.

Flight Distance

Direct air line
123.42 mi
Kilometers
198.62 km
Flight Time
00h 14m

Driving Distance

Road route
177.82 mi
Kilometers
286.17 km
Drive Time
03h 36m

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.

Arrival Snapshot
Arrive in Carbondale
Thu, Apr 23, 9:38 AM MDT
Return by in Thornton
Thu, Apr 23, 1:14 PM MDT
Useful when you're deciding between a quick errand, a day trip, or a longer stop.
Leave Thornton
2026-04-23T06:02
Arrive Carbondale
Thu, Apr 23, 9:38 AM MDT
Route Timing
03h 36m
One way by road
Best Departure Window
6:00 AM to 8:00 AM MDT
Leave early for more breathing room
Arrive between
9:36 AM to 11:36 AM MDT

An early departure helps you fit a real stop into the day without turning the return into a late-night drive.

Leave by
9:48 AM MDT
Keeps a same-day return open with about 04h 00m at the destination.
Back in Thornton
9:00 PM MDT
Early departure recommended

This departure sits inside the recommended comfort window for the route.

Halfway Point

A useful midpoint for breaks, coffee, or meeting in the middle.

Mid-route stop
Frisco
CO

Town in Summit County, Colorado, United States of America

From Thornton
88.8 mi
01h 48m
To Carbondale
89 mi
01h 48m

Route Weather Snapshot

Check the forecast at both ends before you head out.

Origin
68°F
Thursday

Mostly Sunny then Slight Chance Rain Showers

Starts
Thu, Apr 23 6:00 AM MDT
Wind
9 to 17 mph W
Destination
59°F
Thursday

Slight Chance Snow Showers

Starts
Thu, Apr 23 6:00 AM MDT
Wind
5 to 15 mph WSW

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.

  1. 1

    Start on the route

    23 m · 12 sec

  2. 2

    Turn left onto Dorothy Boulevard

    1165 ft · 59 sec · Dorothy Boulevard

  3. 3

    At the end of the road, turn left onto Thornton Parkway

    1.6 km · 2 min · Thornton Parkway

  4. 4

    Turn left onto I 25 South: Colorado Springs

    1973 ft · 40 sec

  5. 5

    Merge slight left onto North Valley Highway

    1.2 mi · 2 min · North Valley Highway

  6. 6

    Keep slight right to continue on North Valley Highway

    1.5 mi · 2 min · North Valley Highway

  7. 7

    Take the exit slight right toward I 76 West: Arvada, Grand Junction

    1.5 km · 2 min

  8. 8

    Merge slight left onto Heartland Expressway

    5.2 mi · 6 min · Heartland Expressway

  9. 9

    Merge slight left

    153.2 mi · 2 hr 55 min

  10. 10

    Take the exit slight right toward CO 82 East: Glenwood Springs, Aspen

    747 ft · 21 sec

  11. 11

    Continue on Laurel Street

    119 m · 15 sec · Laurel Street

  12. 12

    Continue on Grand Avenue

    1204 ft · 45 sec · Grand Avenue

  13. 13

    Turn right onto 8th Street

    2084 ft · 49 sec · 8th Street

  14. 14

    At the end of the road, turn left onto Midland Avenue

    1.6 mi · 3 min · Midland Avenue

  15. 15

    Enter the roundabout and take exit 2 toward 27th Street

    54 m · 3 sec · 27th Street

  16. 16

    Exit the roundabout onto 27th Street

    636 ft · 13 sec · 27th Street

  17. 17

    Enter the roundabout and take exit 2 toward 27th Street

    26 m · 2 sec · 27th Street

  18. 18

    Exit the roundabout onto 27th Street

    692 ft · 19 sec · 27th Street

  19. 19

    Turn right onto Glen Avenue

    9.8 mi · 16 min · Glen Avenue

  20. 20

    Turn right

    1.1 mi · 2 min

  21. 21

    Enter the roundabout and take exit 3 toward Main Street

    68 m · 3 sec · Main Street

  22. 22

    Exit the roundabout onto Main Street

    2385 ft · 53 sec · Main Street

  23. 23

    Turn left onto North 4th Street

    610 ft · 27 sec · North 4th Street

  24. 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.

OSRM road route
Drive Character

Highway-focused drive

Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.

Directions
24 steps
14 turns on the saved route
Ramps & Exits
11
3 merges, 8 ramps or exits
Navigation Density
13.5 / 100 mi
Decision points by distance
Main Roads
Heartland Expressway
158 mi · 89%
Glen Avenue
9.82 mi · 6%
North Valley Highway
2.66 mi · 1%
Midland Avenue
1.64 mi · 1%
Thornton Parkway
0.98 mi · 1%
I 76 West
0.91 mi · 1%
Longest Stretch

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.

Trip Read

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.

Drive Time
03h 36m
Long day trip
Same-Day Return
07h 12m
Round-trip wheel time
Road vs Air
+54.4 mi
123.4 mi direct line
Halfway Stop
Frisco
01h 48m from Thornton
Leave By
9:48 AM MDT
Early departure recommended
Weather Watch

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.

Mid-route Guidance
Local place coverage is thin around Frisco, so nearby transit and meeting points are shown instead.
Reviewed stop coverage is still thin around this midpoint, so practical transit waypoints are shown on the right.

Transit and Meeting Points

Useful pickup, handoff, or rendezvous points close to Frisco.

BUS

Frisco, Colorado

1 mi away
1010 Meadow Drive
BUS

Vail, Colorado

22 mi away
241 South Frontage Road East
BUS

Fairplay, CO

40 mi away
620 US Highway 285
RAIL

Fraser – Winter Park

48 mi away
205 Fraser Avenue

Flight Path Map

This map shows the direct air route between Thornton and Carbondale. Straight-line distance: 123.42 mi (198.62 km).

Thornton

#1 Thornton

The seventh most populous city in Colorado.

Population148,113
Coordinates39.8680400, -104.9719200
Altitude1631
CountryUnited States
Carbondale

#2 Carbondale

Town of the United States

Population6,729
Coordinates39.4022100, -107.2111600
Altitude1881
CountryUnited States
Start: Thornton (-104.97192, 39.86804)
End: Carbondale (-107.21116, 39.40221)

Estimated Travel Time

Distance: 286 km by road

SpeedTime
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.

One-way fuel
6.27 gal
23.75 L · about $23.19
Round trip
$46.37
12.54 gal · 47.5 L
Estimated CO2
55.7 kg one way
Round trip: 111.4 kg / 246 lb CO2, using regular gasoline.
Fuel$/galOne wayRound 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

There is no time difference between Thornton and Carbondale. The current time is 06:02:41.

Distance to Other Cities

Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.

How did we calculate? Place names are translated into coordinates. The Haversine formula calculates straight-line distance; driving distance uses road network data.