How far is Boston, MA from Groton, MA?
The driving distance from Boston, MA to Groton, MA is about 41.6 miles (67 km), with a travel time of about 01h 02m by car.
- The straight-line flight distance is about 31.5 miles (50.7 km).
- For a round trip, plan for roughly 02h 05m 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 02m.
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.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Boston and Groton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boston and Groton.
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1
Start on Tremont Street
70 m · 11 sec · Tremont Street
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2
Turn right onto Beacon Street
92 m · 11 sec · Beacon Street
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3
Turn right onto Somerset Street
104 m · 13 sec · Somerset Street
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4
Turn left onto Ashburton Place
64 m · 7 sec · Ashburton Place
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5
Keep slight right to continue on Ashburton Place
77 m · 9 sec · Ashburton Place
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6
Turn straight onto Bowdoin Street
574 ft · 24 sec · Bowdoin Street
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7
Turn right onto Cambridge Street
134 m · 22 sec · Cambridge Street
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8
Turn left onto Sudbury Street
1490 ft · 1 min · Sudbury Street
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9
Take the ramp left toward I 93 North: Concord NH
1.1 mi · 2 min
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10
Merge slight left
2.8 mi · 4 min
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11
Take the exit slight right toward MA 16 West: Mystic Valley Parkway, Arlington
1293 ft · 32 sec
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12
Continue on Mystic Valley Parkway
1.1 mi · 2 min · Mystic Valley Parkway
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13
Turn right onto Winthrop Street
760 ft · 22 sec · Winthrop Street
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14
Enter the roundabout and take exit 3 toward Winthrop Street
36 m · 2 sec · Winthrop Street
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15
Exit the roundabout onto Winthrop Street
1.3 mi · 2 min · Winthrop Street
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16
Continue on Main Street
2682 ft · 46 sec · Main Street
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17
Enter the roundabout and take exit 3 toward Bacon Street
29 m · 2 sec · Bacon Street
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18
Exit the roundabout onto Bacon Street
1.2 km · 2 min · Bacon Street
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19
Turn left onto Church Street
1781 ft · 38 sec · Church Street
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20
Turn right onto Cambridge Street
1.1 mi · 1 min · Cambridge Street
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21
Continue on Cambridge Road
2 mi · 2 min · Cambridge Road
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22
Continue on Cambridge Street
1 km · 48 sec · Cambridge Street
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23
Take the exit straight toward I 95 South, US 3 North: Waltham, Lowell
945 ft · 27 sec
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24
Merge slight left onto Yankee Division Highway
1.1 mi · 2 min · Yankee Division Highway
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25
Take the exit slight right toward US 3 North: Lowell, Middlesex Turnpike, Burlington, Nashua New Hampshire
626 ft · 15 sec
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26
Keep slight left to continue on US 3 North: Lowell, Nashua New Hampshire
1377 ft · 34 sec
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27
Keep slight right to continue on US 3 North: Lowell, Nashua New Hampshire
9.8 mi · 12 min
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28
Keep slight left
2462 ft · 32 sec
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29
Take the exit slight right toward MA 110, I 495 South: Chelmsford, Marlboro
2299 ft · 43 sec
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30
Keep slight right to continue on I 495 South: Marlboro
1910 ft · 56 sec
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31
Keep slight left to continue on I 495 South: Marlboro
2589 ft · 34 sec
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32
Merge slight left
8.4 mi · 10 min
-
33
Take the exit slight right toward MA 119: Groton, Acton
1410 ft · 43 sec
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34
Turn left onto Great Road
2.1 mi · 4 min · Great Road
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35
Continue on Boston Road
3.9 mi · 7 min · Boston Road
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36
Continue on Main Street
1 km · 2 min · Main Street
-
37
Keep slight right to continue on Main Street
534 ft · 16 sec · Main Street
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38
Turn right
41 m · 15 sec
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39
At the end of the road, turn left
41 m · 14 sec
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40
Turn left
11 m · 3 sec
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41
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Boston and Groton.
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 North
Keep slight right to continue on US 3 North: Lowell, Nashua New Hampshire
9.83 mi · 00h 12m
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.
Partly Sunny leaving Boston and Partly Sunny near Groton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boston to Groton?
The road trip is about 41.6 miles (67 km) and usually takes 01h 02m 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 20.8 miles from Boston and 20.8 miles from Groton.
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 10.1 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 4:24 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.72 one way or $11.44 round trip. Estimated CO2 is about 13.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Boston and Partly Sunny near Groton.
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 Boston and Groton. Straight-line distance: 31.51 mi (50.71 km).
#1 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 |
#2 Groton
Town in Connecticut
| Population | 11,256 |
| Coordinates | 42.6112000, -71.5745100 |
| Altitude | 101 |
| Country | United States |
End: Groton (-71.57451, 42.6112)
Estimated Travel Time
Distance: 67 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 23m |
| 40 mph (64.37 km/h) | 01h 02m |
| 50 mph (80.47 km/h) | 00h 49m |
| 60 mph (96.56 km/h) | 00h 41m |
| 70 mph (112.65 km/h) | 00h 35m |
| 80 mph (129 km/h) | 00h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $5.72 | $11.44 |
| Mid-grade | $4.40 | $6.46 | $12.93 |
| Premium | $4.80 | $7.05 | $14.11 |
| Diesel | $4.49 | $6.60 | $13.19 |
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.