How far is Groton, MA from Boston, MA?
The driving distance from Groton, MA to Boston, MA is about 47.2 miles (75.9 km), with a travel time of about 00h 54m by car.
- The straight-line flight distance is about 31.5 miles (50.7 km).
- For a round trip, plan for roughly 01h 48m 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 00h 54m.
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.
Town in Massachusetts
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers then Mostly Cloudy
Light Rain Likely
Driving Route Map
The map below follows the saved road route between Groton and Boston.
Turn-by-Turn Driving Directions
Step-by-step road directions between Groton and Boston.
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1
Start on the route
27 m · 11 sec
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2
At the end of the road, turn left onto Main Street
1.3 km · 2 min · Main Street
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3
Keep slight left to continue on Boston Road
3.9 mi · 7 min · Boston Road
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4
Continue on Great Road
2.4 mi · 4 min · Great Road
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5
Take the ramp left toward I 495 North: Lowell, Lawrence
1761 ft · 43 sec
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6
Merge slight left
8 mi · 9 min
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7
Take the exit slight right toward US 3: Burlington, Nashua New Hampshire, Lowell Connector
1197 ft · 20 sec
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8
Keep slight right to continue on US 3 South: Burlington
1.1 km · 1 min
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9
Merge slight left
9.8 mi · 11 min
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10
Keep slight left to continue on I 95 North, US 3 South: Boston, Peabody
1 mi · 2 min
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11
Keep slight left
1528 ft · 43 sec
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12
Merge slight left onto Yankee Division Highway
1.5 km · 1 min · Yankee Division Highway
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13
Take the exit slight right toward US 3 South: Winchester
1045 ft · 32 sec
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14
Merge slight left onto Cambridge Street
2354 ft · 35 sec · Cambridge Street
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15
Continue on Cambridge Road
2 mi · 2 min · Cambridge Road
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16
Continue on Cambridge Street
1.1 mi · 1 min · Cambridge Street
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17
Turn left onto Church Street
1781 ft · 38 sec · Church Street
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18
Turn right onto Bacon Street
1.2 km · 2 min · Bacon Street
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19
Enter the roundabout and take exit 1 toward Main Street
11 m · 1 sec · Main Street
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20
Exit the roundabout onto Main Street
2683 ft · 45 sec · Main Street
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21
Continue on Winthrop Street
1.3 mi · 2 min · Winthrop Street
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22
Enter the roundabout and take exit 2 toward Winthrop Street
30 m · 4 sec · Winthrop Street
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23
Exit the roundabout onto Winthrop Street
760 ft · 28 sec · Winthrop Street
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24
Turn left onto Mystic Valley Parkway
2577 ft · 1 min · Mystic Valley Parkway
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25
Continue on Mystic Valley Parkway
608 ft · 10 sec · Mystic Valley Parkway
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26
Take the ramp slight left toward I 93: Boston, Concord New Hampshire
584 ft · 14 sec
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27
Keep slight right to continue on I 93 South: Boston
1322 ft · 32 sec
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28
Merge slight left
1.1 mi · 2 min
-
29
Keep slight left to continue on Interstate 93 HOV lane
1.7 mi · 2 min · Interstate 93 HOV lane
-
30
Keep slight left to continue on Interstate 93 HOV lane
1.4 km · 1 min · Interstate 93 HOV lane
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31
Merge slight right onto John F. Fitzgerald Expressway
2482 ft · 38 sec · John F. Fitzgerald Expressway
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32
Take the exit slight right toward MA 1A Toll: Airport, Government Center
889 ft · 22 sec
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33
Keep slight right to continue on Government Center
1028 ft · 31 sec
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34
Turn straight onto John F. Fitzgerald Surface Road
598 ft · 27 sec · John F. Fitzgerald Surface Road
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35
Turn right onto State Street
1486 ft · 55 sec · State Street
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36
Continue on Court Street
144 m · 20 sec · Court Street
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37
Turn left onto Tremont Street
102 m · 12 sec · Tremont Street
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38
Arrive at your destination
0 m · 1 sec · Tremont Street
Car Route Details
A richer read on the saved driving route between Groton and Boston.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US 3 South
Merge slight left
9.81 mi · 00h 11m
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.
Chance Rain Showers then Mostly Cloudy leaving Groton and Light Rain Likely near Boston.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Groton to Boston?
The road trip is about 47.2 miles (75.9 km) and usually takes 00h 54m 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?
Billerica is a useful midpoint, sitting about 20.6 miles from Groton and 26.6 miles from Boston.
How much longer is the road route than the straight-line distance?
The direct path is about 31.5 miles (50.7 km), while the road route adds roughly 15.7 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:42 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.46 one way or $12.91 round trip. Estimated CO2 is about 14.8 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain Showers then Mostly Cloudy around Groton and Light Rain Likely near Boston.
Stop Ideas Near Billerica
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 Billerica.
Anderson Regional Transportation Center
North Station
Haverhill station
Back Bay station
Flight Path Map
This map shows the direct air route between Groton and Boston. Straight-line distance: 31.51 mi (50.71 km).
#1 Groton
Town in Connecticut
| Population | 11,256 |
| Coordinates | 42.6112000, -71.5745100 |
| Altitude | 101 |
| Country | United States |
#2 Boston
The twenty-first most populous city in the United States and the center of the Boston metropolitan area.
| Population | 691,531 |
| Coordinates | 42.3584300, -71.0597700 |
| Altitude | 14 |
| Country | United States |
End: Tremont Street (-71.060061, 42.358547)
Estimated Travel Time
Distance: 76 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 34m |
| 40 mph (64.37 km/h) | 01h 10m |
| 50 mph (80.47 km/h) | 00h 56m |
| 60 mph (96.56 km/h) | 00h 47m |
| 70 mph (112.65 km/h) | 00h 40m |
| 80 mph (129 km/h) | 00h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $6.46 | $12.91 |
| Mid-grade | $4.40 | $7.30 | $14.60 |
| Premium | $4.80 | $7.97 | $15.93 |
| Diesel | $4.49 | $7.45 | $14.90 |
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 Massachusetts · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.