How far is Longmont, CO from Broomfield, CO?
The driving distance from Longmont, CO to Broomfield, CO is about 17.7 miles (28.5 km), with a travel time of about 00h 28m by car.
- The straight-line flight distance is about 17.1 miles (27.5 km).
- For a round trip, plan for roughly 00h 56m 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 28m.
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.
Town in Boulder County, Colorado, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Snow Showers
Slight Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Longmont and Broomfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Longmont and Broomfield.
-
1
Start on the route
19 m · 10 sec
-
2
Turn left onto 5th Avenue
53 m · 10 sec · 5th Avenue
-
3
Turn left onto Main Street
17.2 mi · 25 min · Main Street
-
4
Turn left onto West Midway Boulevard
913 ft · 30 sec · West Midway Boulevard
-
5
Turn right onto Nickel Street
682 ft · 22 sec · Nickel Street
-
6
Turn left onto West 3rd Avenue
83 m · 17 sec · West 3rd Avenue
-
7
Turn left
58 m · 14 sec
-
8
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Longmont and Broomfield.
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.
Main Street
Turn left onto Main Street
17.2 mi · 00h 25m
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.
Slight Chance Snow Showers leaving Longmont and Slight Chance Snow Showers near Broomfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Longmont to Broomfield?
The road trip is about 17.7 miles (28.5 km) and usually takes 00h 28m 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?
Erie is a useful midpoint, sitting about 8.8 miles from Longmont and 8.9 miles from Broomfield.
How much longer is the road route than the straight-line distance?
The direct path is about 17.1 miles (27.5 km), while the road route adds roughly 0.6 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 7:34 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.29 one way or $4.59 round trip. Estimated CO2 is about 5.5 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Snow Showers around Longmont and Slight Chance Snow Showers near Broomfield.
Stop Ideas Near Erie
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Municipal Court Park
Broomfield City Council
Lafayette City Hall
Old Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Erie.
Longmont, Colorado
Boulder, Colorado
Union Station
Denver (Bus Station), Colorado
Flight Path Map
This map shows the direct air route between Longmont and Broomfield. Straight-line distance: 17.06 mi (27.46 km).
#1 Longmont
The most populous city in Boulder County, Colorado.
| Population | 98,445 |
| Coordinates | 40.1672100, -105.1019300 |
| Altitude | 1519 |
| Country | United States |
#2 Broomfield
A city in Broomfield County, Colorado.
| Population | 72,236 |
| Coordinates | 39.9205400, -105.0866500 |
| Altitude | 1644 |
| Country | United States |
End: (-105.086461, 39.920417)
Estimated Travel Time
Distance: 28 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 35m |
| 40 mph (64.37 km/h) | 00h 26m |
| 50 mph (80.47 km/h) | 00h 21m |
| 60 mph (96.56 km/h) | 00h 17m |
| 70 mph (112.65 km/h) | 00h 15m |
| 80 mph (129 km/h) | 00h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $2.29 | $4.59 |
| Mid-grade | $4.08 | $2.53 | $5.06 |
| Premium | $4.39 | $2.72 | $5.44 |
| Diesel | $4.74 | $2.94 | $5.87 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.