How far is Longmont, CO from Frederick, MD?
The driving distance from Longmont, CO to Frederick, MD is about 1644.1 miles (2646 km), with a travel time of about 29h 42m by car.
- The straight-line flight distance is about 1465.1 miles (2357.9 km).
- For a round trip, plan for roughly 59h 25m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 29h 42m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
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 Longmont and Frederick.
Turn-by-Turn Driving Directions
Step-by-step road directions between Longmont and Frederick.
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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 mi · 4 min · Highway 119
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7
Take the exit right toward I 25 South
2690 ft · 1 min · West I 25 Frontage Road
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8
Merge slight left onto Dwight D. Eisenhower Highway
4.2 mi · 4 min · Dwight D. Eisenhower Highway
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9
Take the exit slight right toward CO 52: Dacono, Fort Lupton
1710 ft · 44 sec
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10
Turn straight
83 m · 14 sec
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11
Continue straight
17.8 mi · 30 min
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12
Enter the roundabout and take exit 1 toward East Bison Highway
36 m · 2 sec · East Bison Highway
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13
Exit the roundabout onto East Bison Highway
1456 ft · 25 sec · East Bison Highway
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14
Enter the roundabout and take exit 2 toward East Bison Highway
36 m · 2 sec · East Bison Highway
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15
Exit the roundabout onto East Bison Highway
158 m · 17 sec · East Bison Highway
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16
Take the ramp left toward I 76 East
942 ft · 23 sec
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17
Merge slight left onto Heartland Expressway
155.5 mi · 2 hr 36 min · Heartland Expressway
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18
Merge slight left
474.5 mi · 8 hr 11 min
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19
Keep slight right to continue on I 35, I 80 East: Chicago, Minneapolis, Kansas City
14.4 mi · 17 min
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20
Keep slight left
152.3 mi · 2 hr 45 min
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21
Take the exit slight right toward I 280 East, US 6 East, US 61 South: Rock Island, Moline
13.2 mi · 16 min
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22
Continue straight
13.9 mi · 15 min
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23
Keep slight left
2239 ft · 27 sec
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24
Merge slight left
144.9 mi · 2 hr 40 min
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25
Keep slight left
23.6 mi · 32 min
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26
Take the exit slight right toward I 80 East, I 90
1.4 km · 2 min
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27
Keep slight right to continue on I 80 East, I 90 East: Ohio, Indiana Toll Road East
1438 ft · 49 sec
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28
Merge slight left onto Indiana Toll Road
135.9 mi · 2 hr 27 min · Indiana Toll Road
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29
Continue on Ohio Turnpike
141.9 mi · 2 hr 32 min · Ohio Turnpike
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30
Keep slight left to continue on Ohio Turnpike
9.2 mi · 10 min · Ohio Turnpike
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31
Keep slight left to continue on Ohio Turnpike
90.1 mi · 1 hr 37 min · Ohio Turnpike
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32
Continue on Pennsylvania Turnpike
161.7 mi · 2 hr 56 min · Pennsylvania Turnpike
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33
Take the exit slight right toward US 30: Breezewood, Baltimore, Washington DC
1.9 mi · 4 min
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34
Keep slight left to continue on US 30 West, To I 70 East: Breezewood, Baltimore
1819 ft · 1 min
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35
Merge slight left onto Lincoln Highway
1670 ft · 43 sec · Lincoln Highway
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36
Turn left onto Dwight D Eisenhower Highway
23.3 mi · 32 min · Dwight D Eisenhower Highway
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37
Continue on Dwight David Eisenhower Highway
1.2 km · 47 sec · Dwight David Eisenhower Highway
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38
Keep slight right to continue on Dwight David Eisenhower Highway
2120 ft · 26 sec · Dwight David Eisenhower Highway
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39
Continue on Dwight D Eisenhower Highway
4.7 mi · 5 min · Dwight D Eisenhower Highway
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40
Continue on I 70, US 40 (Dwight D Eisenhower Highway)
3.3 mi · 4 min · I 70, US 40 (Dwight D Eisenhower Highway)
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41
Continue on Dwight D Eisenhower Highway
44.6 mi · 48 min · Dwight D Eisenhower Highway
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42
Take the exit slight right toward MD 85: Downtown Frederick, Buckeystown
1035 ft · 25 sec
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43
Keep slight left to continue on Downtown Frederick, East Street
655 ft · 18 sec
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44
Turn straight onto Buckeystown Pike
760 ft · 15 sec · Buckeystown Pike
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45
Continue on East Street
773 ft · 15 sec · East Street
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46
Enter the roundabout and take exit 1 toward East Street
36 m · 2 sec · East Street
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47
Exit the roundabout onto East Street
1640 ft · 33 sec · East Street
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48
Turn left onto East South Street
610 ft · 24 sec · East South Street
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49
Turn right onto South Carroll Street
1280 ft · 45 sec · South Carroll Street
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50
Turn left onto East Patrick Street
812 ft · 25 sec · East Patrick Street
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51
Arrive at your destination
0 m · 1 sec · East Patrick Street
Car Route Details
A richer read on the saved driving route between Longmont and Frederick.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Heartland Expressway
Merge slight left
474 mi · 08h 11m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Sunny leaving Longmont and Smoke near Frederick.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Longmont to Frederick?
The road trip is about 1644.1 miles (2646 km) and usually takes 29h 42m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Walcott is a useful midpoint, sitting about 820.5 miles from Longmont and 823.6 miles from Frederick.
How much longer is the road route than the straight-line distance?
The direct path is about 1465.1 miles (2357.9 km), while the road route adds roughly 179 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 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $214.52 one way or $429.04 round trip. Estimated CO2 is about 515.5 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 2 hour time difference between Longmont and Frederick, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Sunny around Longmont and Smoke near Frederick.
Stop Ideas Near Walcott
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 Walcott.
Davenport, Iowa
Rock Island, IL
Moline, Illinois
Galesburg station
Flight Path Map
This map shows the direct air route between Longmont and Frederick. Straight-line distance: 1465.11 mi (2357.86 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 Frederick
The second most populous city in Frederick County, Maryland.
| Population | 73,308 |
| Coordinates | 39.4142700, -77.4105400 |
| Altitude | 87 |
| Country | United States |
End: Frederick (-77.41054, 39.41427)
Estimated Travel Time
Distance: 2646 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 54h 46m |
| 40 mph (64.37 km/h) | 41h 06m |
| 50 mph (80.47 km/h) | 32h 52m |
| 60 mph (96.56 km/h) | 27h 24m |
| 70 mph (112.65 km/h) | 23h 29m |
| 80 mph (129 km/h) | 20h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $214.52 | $429.04 |
| Mid-grade | $4.08 | $236.91 | $473.83 |
| Premium | $4.39 | $254.72 | $509.44 |
| Diesel | $4.74 | $274.79 | $549.59 |
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 · Jul 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.