How far is Boonsboro, MD from Gaithersburg, MD?
The driving distance from Boonsboro, MD to Gaithersburg, MD is about 90.5 miles (145.6 km), with a travel time of about 01h 35m by car.
- The straight-line flight distance is about 73.2 miles (117.8 km).
- For a round trip, plan for roughly 03h 10m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
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 01h 35m.
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.
Census-designated place in Maryland, United Staes
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Clear
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Boonsboro and Gaithersburg.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boonsboro and Gaithersburg.
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1
Start on Ridgely Road
1.4 km · 2 min · Ridgely Road
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2
Continue on 6th Street
1.5 km · 2 min · 6th Street
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3
Continue on Ridgely Road
2.8 mi · 5 min · Ridgely Road
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4
Take the ramp slight right
106 m · 10 sec
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5
Merge slight left onto Shore Highway
1.1 km · 59 sec · Shore Highway
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6
Continue on Queen Anne Highway
6.2 mi · 8 min · Queen Anne Highway
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7
Take the exit slight right
527 ft · 15 sec
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8
Merge slight left onto Ocean Gateway
28.5 mi · 40 min · Ocean Gateway
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9
Continue on John Hanson Highway
18.4 mi · 22 min · John Hanson Highway
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10
Take the exit slight right toward I 95 North, I 495 North: Baltimore, Silver Spring
2347 ft · 57 sec
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11
Keep slight left to continue on I 495 North, I 95 North: Beltway
3221 ft · 1 min
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12
Merge slight left onto Capital Beltway
6.9 mi · 9 min · Capital Beltway
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13
Keep slight left to continue on Capital Beltway
9.5 mi · 12 min · Capital Beltway
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14
Keep slight right to continue on I 270 North: Frederick
3.6 mi · 5 min
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15
Keep slight right to continue on I 270 North
7.3 mi · 10 min
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16
Take the exit slight right toward MD 117, MD 124 South: Clopper Road, West Diamond Avenue, Quince Orchard Road
1387 ft · 42 sec
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17
Turn left onto West Diamond Avenue
2537 ft · 51 sec · West Diamond Avenue
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18
Turn left onto Meem Avenue
616 ft · 29 sec · Meem Avenue
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19
Turn right onto Chestnut Street
1033 ft · 35 sec · Chestnut Street
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20
Turn right onto North Frederick Avenue
77 m · 7 sec · North Frederick Avenue
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21
Turn right
26 m · 6 sec
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22
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Boonsboro and Gaithersburg.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Ocean Gateway
Merge slight left onto Ocean Gateway
28.5 mi · 00h 40m
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.
Mostly Clear leaving Boonsboro and Partly Cloudy near Gaithersburg.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boonsboro to Gaithersburg?
The road trip is about 90.5 miles (145.6 km) and usually takes 01h 35m 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?
Crownsville is a useful midpoint, sitting about 43.9 miles from Boonsboro and 46.5 miles from Gaithersburg.
How much longer is the road route than the straight-line distance?
The direct path is about 73.2 miles (117.8 km), while the road route adds roughly 17.3 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 EDT. If you want a more comfortable same-day return, try to leave by 3:20 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $13.03 one way or $26.07 round trip. Estimated CO2 is about 28.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Boonsboro and Partly Cloudy near Gaithersburg.
Stop Ideas Near Crownsville
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City of Bowie
Upper Marlboro Town Hall
Kenhill Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Crownsville.
BWI Rail Station
New Carrollton station
Pennsylvania Station
Kent Island, MD
Flight Path Map
This map shows the direct air route between Boonsboro and Gaithersburg. Straight-line distance: 73.21 mi (117.82 km).
#1 Boonsboro
Town in Washington County, Maryland, United States
| Population | 3,655 |
| Coordinates | 38.9501100, -75.8599400 |
| Altitude | 18 |
| Country | United States |
#2 Gaithersburg
The second most populous city in Montgomery County, Maryland.
| Population | 67,741 |
| Coordinates | 39.1434400, -77.2013700 |
| Altitude | 153 |
| Country | United States |
End: (-77.201269, 39.143361)
Estimated Travel Time
Distance: 146 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 00m |
| 40 mph (64.37 km/h) | 02h 15m |
| 50 mph (80.47 km/h) | 01h 48m |
| 60 mph (96.56 km/h) | 01h 30m |
| 70 mph (112.65 km/h) | 01h 17m |
| 80 mph (129 km/h) | 01h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $13.03 | $26.07 |
| Mid-grade | $4.60 | $14.67 | $29.34 |
| Premium | $4.95 | $15.80 | $31.61 |
| Diesel | $5.98 | $19.08 | $38.15 |
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 Maryland · May 14, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.