How far is Greeley, CO from Longmont, CO?
The driving distance from Greeley, CO to Longmont, CO is about 39.5 miles (63.6 km), with a travel time of about 00h 48m by car.
- The straight-line flight distance is about 27.2 miles (43.8 km).
- For a round trip, plan for roughly 01h 37m 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 48m.
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.
Municipality in Colorado, USA
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 Greeley and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Greeley and Longmont.
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1
Start on 19th Avenue
964 ft · 48 sec · 19th Avenue
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2
Turn left onto 7th Street
603 ft · 29 sec · 7th Street
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3
At the end of the road, turn right onto 21st Avenue
966 ft · 48 sec · 21st Avenue
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4
Turn left onto 5th Street
1326 ft · 27 sec · 5th Street
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5
Continue on 4th Street
4.1 mi · 8 min · 4th Street
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6
Turn left onto 71st Avenue
2862 ft · 1 min · 71st Avenue
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7
Turn right onto 10th Street
4.8 mi · 6 min · 10th Street
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8
Merge slight left onto Highway 34
5 mi · 6 min · Highway 34
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9
Continue on East Eisenhower Boulevard
1 mi · 1 min · East Eisenhower Boulevard
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10
Take the exit slight right toward I 25 South: Denver
1453 ft · 36 sec
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11
Merge slight left onto Dwight D. Eisenhower Highway
16.7 mi · 17 min · Dwight D. Eisenhower Highway
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12
Take the exit slight right toward CO 119 West
1528 ft · 29 sec
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13
Turn right onto Highway 119
3 mi · 4 min · Highway 119
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14
Continue on East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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15
Take the exit slight right
69 m · 7 sec
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16
Turn right onto East 3rd Avenue
1.9 mi · 4 min · East 3rd Avenue
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17
Turn right onto Kimbark Street
1084 ft · 55 sec · Kimbark Street
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18
Turn left
57 m · 16 sec
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19
Turn right
33 m · 8 sec
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20
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Greeley 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
16.7 mi · 00h 17m
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.
Sunny leaving Greeley and Sunny near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Greeley to Longmont?
The road trip is about 39.5 miles (63.6 km) and usually takes 00h 48m 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?
Johnstown is a useful midpoint, sitting about 20.1 miles from Greeley and 19.4 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 27.2 miles (43.8 km), while the road route adds roughly 12.3 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 4:52 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.14 one way or $10.28 round trip. Estimated CO2 is about 12.4 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Greeley 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 Greeley and Longmont. Straight-line distance: 27.23 mi (43.83 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 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: 64 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 18m |
| 40 mph (64.37 km/h) | 00h 59m |
| 50 mph (80.47 km/h) | 00h 47m |
| 60 mph (96.56 km/h) | 00h 39m |
| 70 mph (112.65 km/h) | 00h 33m |
| 80 mph (129 km/h) | 00h 29m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $5.14 | $10.28 |
| Mid-grade | $4.08 | $5.68 | $11.35 |
| Premium | $4.39 | $6.10 | $12.21 |
| Diesel | $4.74 | $6.58 | $13.17 |
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 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.