How far is Londonderry, NH from Unity, NH?
The driving distance from Londonderry, NH to Unity, NH is about 71.9 miles (115.7 km), with a travel time of about 01h 50m by car.
- The straight-line flight distance is about 53.7 miles (86.4 km).
- For a round trip, plan for roughly 03h 41m 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 50m.
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 Merrimack County, New Hampshire
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Londonderry and Unity.
Turn-by-Turn Driving Directions
Step-by-step road directions between Londonderry and Unity.
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1
Start on Mammoth Road
3.5 mi · 7 min · Mammoth Road
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2
Turn right onto Smith Lane
699 ft · 31 sec · Smith Lane
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3
Turn straight onto Rockingham Road
1.2 mi · 2 min · Rockingham Road
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4
Turn left onto I 93 North
2701 ft · 1 min
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5
Merge slight left onto Alan B Shepard Highway
5.2 mi · 7 min · Alan B Shepard Highway
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6
Keep slight left to continue on I 93 North: Concord, Plymouth
7.1 mi · 9 min
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7
Keep slight left to continue on Everett Turnpike
7 mi · 8 min · Everett Turnpike
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8
Take the exit slight right toward I 89 North: Lebanon, White River Junction Vermont
2720 ft · 1 min
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9
Keep slight right to continue on I 89 North: Lebanon, White River Junction Vermont
1236 ft · 43 sec
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10
Merge slight left
8.1 mi · 10 min
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11
Take the exit slight left toward US 202 West, NH 9 West: Henniker, Keene
1.5 km · 1 min
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12
Continue straight
15.5 mi · 21 min
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13
Continue on West Main Street
1256 ft · 24 sec · West Main Street
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14
Turn right onto 2nd New Hampshire Turnpike
3.9 mi · 7 min · 2nd New Hampshire Turnpike
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15
Continue on State Road
1.5 km · 2 min · State Road
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16
Continue on South Main Street
4.5 mi · 8 min · South Main Street
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17
Turn left onto Lempster Mountain Road
2 mi · 4 min · Lempster Mountain Road
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18
Continue on Mountain Road
3.5 mi · 8 min · Mountain Road
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19
Continue on 2nd New Hampshire Turnpike
1.5 mi · 3 min · 2nd New Hampshire Turnpike
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20
Continue on Lempster Street
3.5 mi · 7 min · Lempster Street
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21
Continue on 2nd NH Turnpike
2.1 mi · 3 min · 2nd NH Turnpike
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22
Arrive at your destination
0 m · 1 sec · 2nd NH Turnpike
Car Route Details
A richer read on the saved driving route between Londonderry and Unity.
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 202 West
Continue straight
15.5 mi · 00h 21m
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.
Clear leaving Londonderry and Clear near Unity.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Londonderry to Unity?
The road trip is about 71.9 miles (115.7 km) and usually takes 01h 50m 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?
Hopkinton is a useful midpoint, sitting about 35.9 miles from Londonderry and 36 miles from Unity.
How much longer is the road route than the straight-line distance?
The direct path is about 53.7 miles (86.4 km), while the road route adds roughly 18.2 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 2:48 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.86 one way or $21.72 round trip. Estimated CO2 is about 22.6 kg one way.
What should you check before leaving?
Before you leave, expect Clear around Londonderry and Clear near Unity.
Stop Ideas Near Hopkinton
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 Hopkinton.
Concord, New Hampshire
Manchester, New Hampshire
Tilton, New Hampshire
Nashua, NH
Flight Path Map
This map shows the direct air route between Londonderry and Unity. Straight-line distance: 53.66 mi (86.35 km).
#1 Londonderry
Town in Rockingham County, New Hampshire, United States of America
| Population | 26,646 |
| Coordinates | 42.8650900, -71.3739500 |
| Altitude | 128 |
| Country | United States |
#2 Unity
Town in Sullivan County, New Hampshire, United States
| Population | 1,616 |
| Coordinates | 43.2939600, -72.2603700 |
| Altitude | 445 |
| Country | United States |
End: Unity (-72.26037, 43.29396)
Estimated Travel Time
Distance: 116 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 23m |
| 40 mph (64.37 km/h) | 01h 47m |
| 50 mph (80.47 km/h) | 01h 26m |
| 60 mph (96.56 km/h) | 01h 11m |
| 70 mph (112.65 km/h) | 01h 01m |
| 80 mph (129 km/h) | 00h 53m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.28 | $10.86 | $21.72 |
| Mid-grade | $4.84 | $12.28 | $24.57 |
| Premium | $5.29 | $13.43 | $26.87 |
| Diesel | $6.10 | $15.50 | $31.00 |
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 New Hampshire · Sep 15, 2026