How far is Somerville, MA from Williamstown, MA?
The driving distance from Somerville, MA to Williamstown, MA is about 156.2 miles (251.3 km), with a travel time of about 03h 30m by car.
- The straight-line flight distance is about 109.4 miles (176.1 km).
- For a round trip, plan for roughly 07h 01m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EDT.
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 03h 30m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Hampden County, Massachusetts, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Somerville and Williamstown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Somerville and Williamstown.
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1
Start on the route
50 m · 18 sec
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2
Turn left onto Highland Avenue
2121 ft · 2 min · Highland Avenue
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3
Continue on Medford Street
134 m · 14 sec · Medford Street
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4
Turn right onto McGrath Highway
121 m · 8 sec · McGrath Highway
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5
Continue on McGrath Highway
960 ft · 19 sec · McGrath Highway
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6
Turn right onto Washington Street
1106 ft · 26 sec · Washington Street
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7
Turn left onto Prospect Street
1.1 mi · 4 min · Prospect Street
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8
Continue on Western Avenue
1.1 km · 2 min · Western Avenue
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9
Turn left onto Soldiers Field Road
1012 ft · 28 sec · Soldiers Field Road
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10
Take the ramp right toward I 90: Mass Pike
1326 ft · 32 sec
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11
Keep slight right to continue on I 90 West: Worcester
2260 ft · 55 sec
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12
Merge slight left onto Massachusetts Turnpike
51.7 mi · 1 hr 1 min · Massachusetts Turnpike
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13
Keep slight left to continue on Massachusetts Turnpike
68 mi · 1 hr 19 min · Massachusetts Turnpike
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14
Take the exit slight right toward US 20: Lee, Pittsfield
3137 ft · 1 min
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15
Keep slight right
115 m · 9 sec
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16
Merge slight left onto Housatonic Street
2865 ft · 1 min · Housatonic Street
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17
Continue on Park Street
648 ft · 18 sec · Park Street
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18
Turn slight right onto Main Street
2327 ft · 1 min · Main Street
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19
Turn left onto West Center Street
959 ft · 13 sec · West Center Street
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20
Continue on Laurel Street
1.2 mi · 2 min · Laurel Street
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21
Continue on Lee Road
1.2 mi · 2 min · Lee Road
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22
Continue on Veterans Memorial Highway
2.2 mi · 3 min · Veterans Memorial Highway
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23
Continue on Pittsfield Road
2.5 mi · 5 min · Pittsfield Road
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24
Continue on South Street
2.9 mi · 6 min · South Street
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25
Keep slight right to continue on Bank Row
926 ft · 26 sec · Bank Row
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26
Turn left onto First Street
1.4 km · 3 min · First Street
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27
Continue on North Street
2.6 mi · 6 min · North Street
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28
Continue on South Main Street
3.2 mi · 6 min · South Main Street
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29
Continue on Williamstown Road
3.8 mi · 5 min · Williamstown Road
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30
Continue on New Ashford Road
1.2 mi · 2 min · New Ashford Road
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31
Continue on Route 7
2.2 mi · 3 min · Route 7
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32
Continue on New Ashford Road
2.3 mi · 4 min · New Ashford Road
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33
Continue on Cold Spring Road
4.1 mi · 8 min · Cold Spring Road
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34
Continue on Main Street
153 m · 17 sec · Main Street
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35
Continue on Main Street
1538 ft · 45 sec · Main Street
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36
Turn right onto Spring Street
46 m · 4 sec · Spring Street
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37
Arrive at your destination
0 m · 1 sec · Spring Street
Car Route Details
A richer read on the saved driving route between Somerville and Williamstown.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Massachusetts Turnpike
Keep slight left to continue on Massachusetts Turnpike
68 mi · 01h 19m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Partly Sunny leaving Somerville and Mostly Sunny near Williamstown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Somerville to Williamstown?
The road trip is about 156.2 miles (251.3 km) and usually takes 03h 30m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Ludlow is a useful midpoint, sitting about 78 miles from Somerville and 78.2 miles from Williamstown.
How much longer is the road route than the straight-line distance?
The direct path is about 109.4 miles (176.1 km), while the road route adds roughly 46.8 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 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 9:58 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.43 one way or $42.87 round trip. Estimated CO2 is about 49 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Somerville and Mostly Sunny near Williamstown.
Stop Ideas Near Ludlow
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 Ludlow.
Springfield Union Station
Union Station
Amherst, Massachusetts
Windsor Locks
Flight Path Map
This map shows the direct air route between Somerville and Williamstown. Straight-line distance: 109.42 mi (176.1 km).
#1 Somerville
A city in Middlesex County, Massachusetts.
| Population | 80,935 |
| Coordinates | 42.3876000, -71.0995000 |
| Altitude | 28 |
| Country | United States |
#2 Williamstown
Town in Massachusetts
| Population | 7,631 |
| Coordinates | 42.7120200, -73.2037200 |
| Altitude | 209 |
| Country | United States |
End: Williamstown (-73.20372, 42.71202)
Estimated Travel Time
Distance: 251 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 12m |
| 40 mph (64.37 km/h) | 03h 54m |
| 50 mph (80.47 km/h) | 03h 07m |
| 60 mph (96.56 km/h) | 02h 36m |
| 70 mph (112.65 km/h) | 02h 13m |
| 80 mph (129 km/h) | 01h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $21.43 | $42.87 |
| Mid-grade | $4.40 | $24.23 | $48.45 |
| Premium | $4.80 | $26.44 | $52.88 |
| Diesel | $4.49 | $24.73 | $49.46 |
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.