How far is Portsmouth, NH from Londonderry, NH?
The driving distance from Portsmouth, NH to Londonderry, NH is about 52.5 miles (84.5 km), with a travel time of about 00h 55m by car.
- The straight-line flight distance is about 34.4 miles (55.4 km).
- For a round trip, plan for roughly 01h 51m 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 55m.
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 New Hampshire
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers then Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Portsmouth and Londonderry.
Turn-by-Turn Driving Directions
Step-by-step road directions between Portsmouth and Londonderry.
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1
Start on Congress Street
124 m · 15 sec · Congress Street
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2
Turn right onto Fleet Street
141 m · 17 sec · Fleet Street
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3
Turn right onto Hanover Street
662 ft · 27 sec · Hanover Street
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4
At the end of the road, turn left onto Market Street
1 mi · 3 min · Market Street
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5
Take the ramp left toward I 95 South: Hampton, Boston
1468 ft · 36 sec
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6
Merge slight left
9 mi · 11 min
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7
Keep slight left to continue on Blue Star Turnpike
7.7 mi · 9 min · Blue Star Turnpike
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8
Keep slight right to continue on I 495 South: Worcester
16.3 mi · 19 min
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9
Take the exit slight right toward MA 213: Methuen, Salem New Hampshire, Manchester-Boston Regional Airport
1302 ft · 37 sec
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10
Continue on Loop Connector
3.3 mi · 4 min · Loop Connector
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11
Take the exit slight right toward I 93 North: Concord New Hampshire
1920 ft · 37 sec
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12
Merge slight right
1.7 mi · 2 min
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13
Continue straight
9.9 mi · 11 min
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14
Take the exit slight right toward NH 102: Derry, Londonderry
1778 ft · 1 min
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15
Keep slight left to continue on NH 102 West: Londonderry, Nashua
54 m · 8 sec
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16
Turn left onto Nashua Road
3120 ft · 2 min · Nashua Road
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17
Turn right onto Gilcreast Road
1.2 km · 2 min · Gilcreast Road
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18
Continue on Pillsbury Road
787 ft · 22 sec · Pillsbury Road
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19
Continue on Pillsbury Road
1 mi · 2 min · Pillsbury Road
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20
Turn right onto Mammoth Road
23 m · 2 sec · Mammoth Road
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21
Arrive at your destination
0 m · 1 sec · Mammoth Road
Car Route Details
A richer read on the saved driving route between Portsmouth and Londonderry.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 495 South
Keep slight right to continue on I 495 South: Worcester
16.3 mi · 00h 19m
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.
Slight Chance Rain Showers then Partly Sunny leaving Portsmouth and Partly Sunny near Londonderry.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Portsmouth to Londonderry?
The road trip is about 52.5 miles (84.5 km) and usually takes 00h 55m 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?
Plaistow is a useful midpoint, sitting about 26.5 miles from Portsmouth and 26 miles from Londonderry.
How much longer is the road route than the straight-line distance?
The direct path is about 34.4 miles (55.4 km), while the road route adds roughly 18.1 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 4:38 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.30 one way or $14.60 round trip. Estimated CO2 is about 16.4 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers then Partly Sunny around Portsmouth and Partly Sunny near Londonderry.
Stop Ideas Near Plaistow
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 Plaistow.
Haverhill station
Newburyport, Massachusetts
Exeter station
Nashua, NH
Flight Path Map
This map shows the direct air route between Portsmouth and Londonderry. Straight-line distance: 34.42 mi (55.4 km).
#1 Portsmouth
City in Rockingham County, New Hampshire, United States
| Population | 21,557 |
| Coordinates | 43.0770400, -70.7576600 |
| Altitude | 6 |
| Country | United States |
#2 Londonderry
Town in Rockingham County, New Hampshire, United States of America
| Population | 26,646 |
| Coordinates | 42.8650900, -71.3739500 |
| Altitude | 128 |
| Country | United States |
End: Mammoth Road (-71.374062, 42.865057)
Estimated Travel Time
Distance: 85 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 44m |
| 40 mph (64.37 km/h) | 01h 18m |
| 50 mph (80.47 km/h) | 01h 03m |
| 60 mph (96.56 km/h) | 00h 52m |
| 70 mph (112.65 km/h) | 00h 45m |
| 80 mph (129 km/h) | 00h 39m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $7.30 | $14.60 |
| Mid-grade | $4.46 | $8.25 | $16.49 |
| Premium | $4.86 | $8.99 | $17.97 |
| Diesel | $6.00 | $11.09 | $22.19 |
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 New Hampshire · 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.