How far is Waltham, MA from Dennis, MA?
The driving distance from Waltham, MA to Dennis, MA is about 86.8 miles (139.7 km), with a travel time of about 02h 01m by car.
- The straight-line flight distance is about 69.4 miles (111.7 km).
- For a round trip, plan for roughly 04h 03m 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 02h 01m.
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.
Coastal town in Plymouth County, Massachusetts, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Waltham and Dennis.
Turn-by-Turn Driving Directions
Step-by-step road directions between Waltham and Dennis.
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1
Start on Main Street
2.8 mi · 6 min · Main Street
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2
Turn slight right
77 m · 9 sec
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3
Turn straight onto Galen Street
2268 ft · 44 sec · Galen Street
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4
Continue on Centre Street
152 m · 19 sec · Centre Street
-
5
Continue on Centre Street
97 m · 12 sec · Centre Street
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6
Turn straight onto Washington Street
693 ft · 28 sec · Washington Street
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7
Turn slight left onto Centre Street
694 ft · 22 sec · Centre Street
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8
Continue on Centre Street
21 m · 3 sec · Centre Street
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9
Take the ramp slight left toward Centre Street
653 ft · 24 sec · Centre Street
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10
Continue on Washington Street
87 m · 7 sec · Washington Street
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11
Keep slight left to continue on Washington Street
92 m · 6 sec · Washington Street
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12
Continue on Saint James Street
55 m · 4 sec · Saint James Street
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13
Take the ramp slight right toward I 90 East: Boston
1159 ft · 28 sec
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14
Merge slight left onto Massachusetts Turnpike
6.2 mi · 9 min · Massachusetts Turnpike
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15
Take the exit slight left toward I 93: South Station, Concord New Hampshire, Quincy
156 m · 13 sec
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16
Keep slight left to continue on I 93 South, I 93 North: Quincy, Concord New Hampshire
138 m · 11 sec
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17
Keep slight left to continue on I 93 South: Quincy
2957 ft · 1 min
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18
Merge slight right onto John F. Fitzgerald Expressway
1.2 km · 1 min · John F. Fitzgerald Expressway
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19
Continue on Southeast Expressway
8 mi · 11 min · Southeast Expressway
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20
Keep slight left to continue on MA 3 South: Cape Cod
30.9 mi · 39 min
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21
Keep slight right to continue on Pilgrims Highway
12 mi · 15 min · Pilgrims Highway
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22
Continue on Pilgrim Highway
930 ft · 20 sec · Pilgrim Highway
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23
Continue on Sagamore Bridge
2134 ft · 46 sec · Sagamore Bridge
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24
Continue on Mid Cape Highway
17.3 mi · 24 min · Mid Cape Highway
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25
Take the exit slight right toward Yarmouthport, West Yarmouth
967 ft · 27 sec
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26
Turn right onto Willow Street
1.3 mi · 3 min · Willow Street
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27
At the end of the road, turn right onto Main Street
3.4 mi · 6 min · Main Street
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28
Continue on Route 6A
1.2 mi · 2 min · Route 6A
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29
Turn right
59 m · 14 sec
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30
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Waltham and Dennis.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
MA 3 South
Keep slight left to continue on MA 3 South: Cape Cod
30.9 mi · 00h 39m
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 Cloudy leaving Waltham and Sunny near Dennis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Waltham to Dennis?
The road trip is about 86.8 miles (139.7 km) and usually takes 02h 01m 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?
Kingston is a useful midpoint, sitting about 43.4 miles from Waltham and 43.4 miles from Dennis.
How much longer is the road route than the straight-line distance?
The direct path is about 69.4 miles (111.7 km), while the road route adds roughly 17.4 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 2:26 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.90 one way or $23.81 round trip. Estimated CO2 is about 27.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Waltham and Sunny near Dennis.
Stop Ideas Near Kingston
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 Kingston.
Route 128 station
South Station
Back Bay station
North Station
Flight Path Map
This map shows the direct air route between Waltham and Dennis. Straight-line distance: 69.41 mi (111.71 km).
#1 Waltham
A city in Middlesex County, Massachusetts.
| Population | 62,069 |
| Coordinates | 42.3764900, -71.2356100 |
| Altitude | 20 |
| Country | United States |
#2 Dennis
Town in Barnstable County, Massachusetts, United States
| Population | 13,890 |
| Coordinates | 41.7353900, -70.1939100 |
| Altitude | 5 |
| Country | United States |
End: Dennis (-70.19391, 41.73539)
Estimated Travel Time
Distance: 140 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 53m |
| 40 mph (64.37 km/h) | 02h 10m |
| 50 mph (80.47 km/h) | 01h 44m |
| 60 mph (96.56 km/h) | 01h 26m |
| 70 mph (112.65 km/h) | 01h 14m |
| 80 mph (129 km/h) | 01h 04m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $11.90 | $23.81 |
| Mid-grade | $4.40 | $13.45 | $26.91 |
| Premium | $4.80 | $14.68 | $29.37 |
| Diesel | $4.49 | $13.73 | $27.47 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.