How far is Thornton, CO from Welby, CO?
The driving distance from Thornton, CO to Welby, CO is about 3 miles (4.9 km), with a travel time of about 00h 07m by car.
- The straight-line flight distance is about 2.3 miles (3.7 km).
- For a round trip, plan for roughly 00h 15m 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 07m.
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.
City in Adams County, Colorado, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Thornton and Welby.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Welby.
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1
Start on the route
23 m · 7 sec
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2
Turn right onto Dorothy Boulevard
961 ft · 42 sec · Dorothy Boulevard
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3
At the end of the road, turn left onto Hoffman Way
1.6 km · 3 min · Hoffman Way
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4
Turn left onto East 88th Avenue
2242 ft · 1 min · East 88th Avenue
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5
Turn right onto Devonshire Boulevard
2499 ft · 1 min · Devonshire Boulevard
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6
Continue on Welby Road
2657 ft · 1 min · Welby Road
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7
Continue on North York Street
2264 ft · 57 sec · North York Street
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8
Arrive at your destination
0 m · 1 sec · North York Street
Car Route Details
A richer read on the saved driving route between Thornton and Welby.
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.
Hoffman Way
At the end of the road, turn left onto Hoffman Way
0.99 mi · 00h 03m
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.
Sunny leaving Thornton and Sunny near Welby.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Welby?
The road trip is about 3 miles (4.9 km) and usually takes 00h 07m 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?
Federal Heights is a useful midpoint, sitting about 1.5 miles from Thornton and 1.5 miles from Welby.
How much longer is the road route than the straight-line distance?
The direct path is about 2.3 miles (3.7 km), while the road route adds roughly 0.7 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 8:14 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $0.41 one way or $0.81 round trip. Estimated CO2 is about 1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Thornton and Sunny near Welby.
Stop Ideas Near Federal Heights
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Fairplay Park
Denver City Council
Lafayette City Hall
Municipal Court Park
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Federal Heights.
Denver (Bus Station), Colorado
Union Station
Boulder, Colorado
Longmont, Colorado
Flight Path Map
This map shows the direct air route between Thornton and Welby. Straight-line distance: 2.27 mi (3.66 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Welby
Census-designated place in Colorado
| Population | 14,846 |
| Coordinates | 39.8366500, -104.9591500 |
| Altitude | 1565 |
| Country | United States |
End: Welby (-104.95915, 39.83665)
Estimated Travel Time
Distance: 5 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 06m |
| 40 mph (64.37 km/h) | 00h 04m |
| 50 mph (80.47 km/h) | 00h 03m |
| 60 mph (96.56 km/h) | 00h 03m |
| 70 mph (112.65 km/h) | 00h 02m |
| 80 mph (129 km/h) | 00h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $0.41 | $0.81 |
| Mid-grade | $4.08 | $0.45 | $0.90 |
| Premium | $4.39 | $0.48 | $0.97 |
| Diesel | $4.74 | $0.52 | $1.04 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.