How far is Cambridge, MA from Ayer, MA?
The driving distance from Cambridge, MA to Ayer, MA is about 31.1 miles (50 km), with a travel time of about 00h 52m by car.
- The straight-line flight distance is about 27.8 miles (44.8 km).
- For a round trip, plan for roughly 01h 44m 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 52m.
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 Middlesex County, Massachusetts, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Patchy Fog then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Cambridge and Ayer.
Turn-by-Turn Driving Directions
Step-by-step road directions between Cambridge and Ayer.
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1
Start on Leonard Avenue
81 m · 14 sec · Leonard Avenue
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2
Turn right onto Cambridge Street
1.1 km · 3 min · Cambridge Street
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3
Continue on Cambridge Street
33 m · 4 sec · Cambridge Street
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4
Turn left onto Massachusetts Avenue
49 m · 7 sec · Massachusetts Avenue
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5
Turn right onto Garden Street
1679 ft · 1 min · Garden Street
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6
Continue on Concord Avenue
1.1 mi · 3 min · Concord Avenue
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7
Enter the roundabout and take exit 2 toward Brodette Memorial Circle
14 m · 2 sec · Concord Avenue
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8
Exit the rotary onto Concord Avenue
875 ft · 32 sec · Concord Avenue
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9
Keep slight right to continue on Alewife Brook Parkway
1 km · 49 sec · Alewife Brook Parkway
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10
Keep slight left to continue on Concord Turnpike
4.1 mi · 6 min · Concord Turnpike
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11
Continue on Concord Highway
2.9 mi · 4 min · Concord Highway
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12
Continue on Cambridge Turnpike
3.3 mi · 5 min · Cambridge Turnpike
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13
Continue on Concord Turnpike
3.9 mi · 6 min · Concord Turnpike
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14
Continue on Elm Street
1635 ft · 35 sec · Elm Street
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15
Enter the roundabout and take exit 3 toward Concord Rotary
124 m · 5 sec · Union Turnpike
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16
Exit the rotary onto Union Turnpike
3035 ft · 39 sec · Union Turnpike
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17
Continue on Massachusetts Avenue
6.2 mi · 9 min · Massachusetts Avenue
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18
Continue on George W Stanton Highway
1406 ft · 22 sec · George W Stanton Highway
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19
Continue on Captain Isaac Davis Highway
1680 ft · 26 sec · Captain Isaac Davis Highway
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20
Take the exit slight right toward Littleton
849 ft · 18 sec
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21
Keep slight left to continue on Littleton
65 m · 6 sec
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22
Turn left onto Taylor Street
1.6 km · 2 min · Taylor Street
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23
Turn right onto King Street
715 ft · 22 sec · King Street
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24
At the end of the road, turn left onto Ayer Road
1.8 mi · 3 min · Ayer Road
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25
Continue on Littleton Road
1.9 mi · 3 min · Littleton Road
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26
Enter the roundabout and take exit 2 toward East Main Street
69 m · 4 sec · East Main Street
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27
Exit the roundabout onto East Main Street
1 mi · 2 min · East Main Street
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28
Turn right onto Park Street
128 m · 7 sec · Park Street
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29
Arrive at your destination
0 m · 1 sec · Park Street
Car Route Details
A richer read on the saved driving route between Cambridge and Ayer.
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.
Massachusetts Avenue
Continue on Massachusetts Avenue
6.24 mi · 00h 09m
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 leaving Cambridge and Patchy Fog then Slight Chance Showers And Thunderstorms near Ayer.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Cambridge to Ayer?
The road trip is about 31.1 miles (50 km) and usually takes 00h 52m 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?
Concord is a useful midpoint, sitting about 15.5 miles from Cambridge and 15.5 miles from Ayer.
How much longer is the road route than the straight-line distance?
The direct path is about 27.8 miles (44.8 km), while the road route adds roughly 3.3 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 4:46 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.28 one way or $8.56 round trip. Estimated CO2 is about 9.8 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain Showers around Cambridge and Patchy Fog then Slight Chance Showers And Thunderstorms near Ayer.
Stop Ideas Near Concord
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 Concord.
Anderson Regional Transportation Center
Framingham station
Back Bay station
North Station
Flight Path Map
This map shows the direct air route between Cambridge and Ayer. Straight-line distance: 27.82 mi (44.78 km).
#1 Cambridge
The most populous city in Middlesex County, Massachusetts.
| Population | 119,192 |
| Coordinates | 42.3751000, -71.1056100 |
| Altitude | 5 |
| Country | United States |
#2 Ayer
City in Middlesex County, Massachusetts, United States of America
| Population | 8,211 |
| Coordinates | 42.5612000, -71.5897900 |
| Altitude | 73 |
| Country | United States |
End: Ayer (-71.58979, 42.5612)
Estimated Travel Time
Distance: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 02m |
| 40 mph (64.37 km/h) | 00h 46m |
| 50 mph (80.47 km/h) | 00h 37m |
| 60 mph (96.56 km/h) | 00h 31m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $4.28 | $8.56 |
| Mid-grade | $4.40 | $4.84 | $9.67 |
| Premium | $4.80 | $5.28 | $10.56 |
| Diesel | $4.49 | $4.94 | $9.87 |
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 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.