How far is Plymouth, NH from Portsmouth, NH?
The driving distance from Plymouth, NH to Portsmouth, NH is about 102.3 miles (164.6 km), with a travel time of about 01h 35m by car.
- The straight-line flight distance is about 66.2 miles (106.6 km).
- For a round trip, plan for roughly 03h 10m 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 35m.
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.
The capital of New Hampshire.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Plymouth and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Plymouth and Portsmouth.
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1
Start on Main Street
1087 ft · 36 sec · Main Street
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2
Enter the roundabout and take exit 1 toward Holderness Road
10 m · 3 sec · Holderness Road
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3
Exit the roundabout onto Holderness Road
118 m · 21 sec · Holderness Road
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4
Continue on NH Route 175A
1964 ft · 54 sec · NH Route 175A
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5
Take the ramp right toward I 93 South
1492 ft · 36 sec
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6
Merge slight left onto Styles Bridges Highway
25.4 mi · 27 min · Styles Bridges Highway
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7
Continue on Senator Styles Bridges Highway
15.4 mi · 18 min · Senator Styles Bridges Highway
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8
Take the exit slight right toward I 393 East, US 4 East, US 202 East: Loudon, Portsmouth
10 mi · 16 min
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9
Enter the roundabout and take exit 2 toward Epsom Circle
76 m · 6 sec · Dover Road
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10
Exit the rotary onto Dover Road
4.3 mi · 7 min · Dover Road
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11
Continue on First New Hampshire Turnpike
7.8 mi · 13 min · First New Hampshire Turnpike
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12
Continue on Old Turnpike Road
5.1 mi · 7 min · Old Turnpike Road
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13
Continue on Old Concord Turnpike
1.8 mi · 3 min · Old Concord Turnpike
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14
Continue on Concord Road
2565 ft · 56 sec · Concord Road
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15
Enter the roundabout and take exit 2 toward Lee Circle
50 m · 5 sec · Concord Road
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16
Exit the rotary onto Concord Road
8.9 mi · 14 min · Concord Road
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17
Continue on Scammell Bridge
1132 ft · 28 sec · Scammell Bridge
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18
Continue on Boston Harbor Road
812 ft · 22 sec · Boston Harbor Road
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19
Enter the roundabout and take exit 2 toward the route
54 m · 4 sec
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20
Exit the roundabout
684 ft · 17 sec
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21
Take the exit slight right
2827 ft · 1 min
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22
Merge slight left onto Spaulding Turnpike
3.5 mi · 5 min · Spaulding Turnpike
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23
Take the exit slight left toward I 95 North
1.5 km · 2 min
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24
Enter the roundabout and take exit 3 toward Portsmouth Traffic Circle
692 ft · 20 sec
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25
Exit the rotary onto US 1 Bypass North: Portsmouth, Woodbury Avenue
1.6 km · 2 min
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26
Turn left onto Submarine Way
566 ft · 18 sec · Submarine Way
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27
Turn right onto Market Street
1 km · 2 min · Market Street
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28
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
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29
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Plymouth and Portsmouth.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Styles Bridges Highway
Merge slight left onto Styles Bridges Highway
25.4 mi · 00h 27m
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 Sunny leaving Plymouth and Mostly Sunny near Portsmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Plymouth to Portsmouth?
The road trip is about 102.3 miles (164.6 km) and usually takes 01h 35m 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 43.7 miles from Plymouth and 58.5 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 66.2 miles (106.6 km), while the road route adds roughly 36.1 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 3:20 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $15.50 one way or $31.00 round trip. Estimated CO2 is about 32.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Plymouth and Mostly Sunny near Portsmouth.
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.
Concord, New Hampshire
Manchester, New Hampshire
Tilton, New Hampshire
New Hampton, New Hampshire
Flight Path Map
This map shows the direct air route between Plymouth and Portsmouth. Straight-line distance: 66.24 mi (106.6 km).
#1 Plymouth
Town in New Hampshire
| Population | 6,916 |
| Coordinates | 43.7570200, -71.6881300 |
| Altitude | 157 |
| Country | United States |
#2 Portsmouth
City in Rockingham County, New Hampshire, United States
| Population | 21,557 |
| Coordinates | 43.0770400, -70.7576600 |
| Altitude | 6 |
| Country | United States |
End: Congress Street (-70.757617, 43.077054)
Estimated Travel Time
Distance: 165 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 24m |
| 40 mph (64.37 km/h) | 02h 33m |
| 50 mph (80.47 km/h) | 02h 02m |
| 60 mph (96.56 km/h) | 01h 42m |
| 70 mph (112.65 km/h) | 01h 27m |
| 80 mph (129 km/h) | 01h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.29 | $15.50 | $31.00 |
| Mid-grade | $4.88 | $17.63 | $35.26 |
| Premium | $5.34 | $19.27 | $38.53 |
| Diesel | $6.35 | $22.93 | $45.86 |
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 · Oct 15, 2026