How far is Fort Collins, CO from Longmont, CO?
The driving distance from Fort Collins, CO to Longmont, CO is about 40.7 miles (65.5 km), with a travel time of about 00h 45m by car.
- The straight-line flight distance is about 28.9 miles (46.5 km).
- For a round trip, plan for roughly 01h 30m 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 45m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Municipality in Colorado, USA
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 Fort Collins and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Collins and Longmont.
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1
Start on South Sherwood Street
841 ft · 37 sec · South Sherwood Street
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2
Continue on West Magnolia Street
145 m · 18 sec · West Magnolia Street
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3
Turn right onto South Meldrum Street
152 m · 29 sec · South Meldrum Street
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4
Turn left onto West Mulberry Street
1494 ft · 44 sec · West Mulberry Street
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5
Continue on East Mulberry Street
3.9 mi · 7 min · East Mulberry Street
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6
Take the exit slight right toward I 25 South: Denver
1355 ft · 33 sec
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7
Merge slight left onto Dwight D. Eisenhower Highway
28.7 mi · 29 min · Dwight D. Eisenhower Highway
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8
Take the exit slight right toward CO 119 West
1528 ft · 29 sec
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9
Turn right onto Highway 119
3 mi · 4 min · Highway 119
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10
Continue on East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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11
Take the exit slight right
69 m · 7 sec
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12
Turn right onto East 3rd Avenue
1.9 mi · 4 min · East 3rd Avenue
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13
Turn right onto Kimbark Street
1084 ft · 55 sec · Kimbark Street
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14
Turn left
57 m · 16 sec
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15
Turn right
33 m · 8 sec
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16
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Fort Collins and Longmont.
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
28.7 mi · 00h 29m
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.
Mostly Sunny leaving Fort Collins and Sunny near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fort Collins to Longmont?
The road trip is about 40.7 miles (65.5 km) and usually takes 00h 45m 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?
Johnstown is a useful midpoint, sitting about 20.3 miles from Fort Collins and 20.4 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 28.9 miles (46.5 km), while the road route adds roughly 11.8 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 7:00 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.33 one way or $10.65 round trip. Estimated CO2 is about 12.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Fort Collins and Sunny near Longmont.
Stop Ideas Near Johnstown
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 Johnstown.
Longmont, Colorado
Fort Collins, Colorado
Boulder, Colorado
Union Station
Flight Path Map
This map shows the direct air route between Fort Collins and Longmont. Straight-line distance: 28.9 mi (46.51 km).
#1 Fort Collins
The fifth most populous city in Colorado.
| Population | 168,234 |
| Coordinates | 40.5852600, -105.0844200 |
| Altitude | 1525 |
| Country | United States |
#2 Longmont
The most populous city in Boulder County, Colorado.
| Population | 98,445 |
| Coordinates | 40.1672100, -105.1019300 |
| Altitude | 1519 |
| Country | United States |
End: (-105.101861, 40.16721)
Estimated Travel Time
Distance: 65 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 21m |
| 40 mph (64.37 km/h) | 01h 01m |
| 50 mph (80.47 km/h) | 00h 48m |
| 60 mph (96.56 km/h) | 00h 40m |
| 70 mph (112.65 km/h) | 00h 34m |
| 80 mph (129 km/h) | 00h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $5.33 | $10.65 |
| Mid-grade | $4.08 | $5.88 | $11.76 |
| Premium | $4.39 | $6.32 | $12.65 |
| Diesel | $4.74 | $6.82 | $13.64 |
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.