How far is Longmont, CO from Platteville, CO?
The driving distance from Longmont, CO to Platteville, CO is about 18.8 miles (30.3 km), with a travel time of about 00h 29m by car.
- The straight-line flight distance is about 15.1 miles (24.3 km).
- For a round trip, plan for roughly 00h 58m 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 29m.
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 Weld County, Colorado, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Snow Showers
Slight Chance Snow Showers then Mostly Sunny
Driving Route Map
The map below follows the saved road route between Longmont and Platteville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Longmont and Platteville.
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1
Start on the route
19 m · 7 sec
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2
Turn right onto 5th Avenue
1025 ft · 47 sec · 5th Avenue
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3
Turn right onto Collyer Street
1255 ft · 42 sec · Collyer Street
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4
Turn left onto 3rd Avenue
1.8 mi · 3 min · 3rd Avenue
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5
Turn left onto East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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6
Continue on Highway 119
3.1 mi · 4 min · Highway 119
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7
Turn left onto I 25 North
1400 ft · 34 sec
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8
Merge slight left onto Dwight D. Eisenhower Highway
2.4 mi · 2 min · Dwight D. Eisenhower Highway
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9
Take the exit slight right toward CO 66: Lyons, Longmont
1724 ft · 42 sec
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10
Turn right
8.3 mi · 14 min
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11
Turn left onto Main Street
3058 ft · 1 min · Main Street
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12
Turn right onto Marion Avenue
41 m · 6 sec · Marion Avenue
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13
Arrive at your destination
0 m · 1 sec · Marion Avenue
Car Route Details
A richer read on the saved driving route between Longmont and Platteville.
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.
Longest stretch
Turn right
8.28 mi · 00h 14m
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 then Mostly Sunny near Platteville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Longmont to Platteville?
The road trip is about 18.8 miles (30.3 km) and usually takes 00h 29m 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?
Mead is a useful midpoint, sitting about 9.4 miles from Longmont and 9.4 miles from Platteville.
How much longer is the road route than the straight-line distance?
The direct path is about 15.1 miles (24.3 km), while the road route adds roughly 3.7 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 7:32 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.48 one way or $4.96 round trip. Estimated CO2 is about 6 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Snow Showers around Longmont and Slight Chance Snow Showers then Mostly Sunny near Platteville.
Stop Ideas Near Mead
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old Town Hall
Town of Frederick
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Mead.
Longmont, Colorado
Boulder, Colorado
Fort Collins, Colorado
Union Station
Flight Path Map
This map shows the direct air route between Longmont and Platteville. Straight-line distance: 15.1 mi (24.3 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 Platteville
Human settlement in Weld County, Colorado, United States of America
| Population | 3,000 |
| Coordinates | 40.2149800, -104.8227500 |
| Altitude | 1467 |
| Country | United States |
End: Platteville (-104.82275, 40.21498)
Estimated Travel Time
Distance: 30 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 37m |
| 40 mph (64.37 km/h) | 00h 28m |
| 50 mph (80.47 km/h) | 00h 22m |
| 60 mph (96.56 km/h) | 00h 18m |
| 70 mph (112.65 km/h) | 00h 16m |
| 80 mph (129 km/h) | 00h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $2.48 | $4.96 |
| Mid-grade | $4.08 | $2.74 | $5.47 |
| Premium | $4.39 | $2.94 | $5.88 |
| Diesel | $4.74 | $3.17 | $6.35 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.