How far is Charlestown, NH from Portsmouth, NH?
The driving distance from Charlestown, NH to Portsmouth, NH is about 123.3 miles (198.5 km), with a travel time of about 02h 16m by car.
- The straight-line flight distance is about 84.8 miles (136.4 km).
- For a round trip, plan for roughly 04h 32m 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 16m.
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.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Charlestown and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Charlestown and Portsmouth.
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1
Start on Sullivan Street
28 m · 3 sec · Sullivan Street
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2
Continue on Sullivan Street
44 m · 7 sec · Sullivan Street
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3
Turn right onto North Main Street
963 ft · 16 sec · North Main Street
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4
Continue on Claremont Road
7.4 mi · 11 min · Claremont Road
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5
Continue on Charlestown Road
2.1 mi · 3 min · Charlestown Road
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6
Continue on West Pleasant Street
1.3 km · 1 min · West Pleasant Street
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7
Turn right onto Glidden Street
631 ft · 28 sec · Glidden Street
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8
At the end of the road, turn left onto Broad Street
158 m · 13 sec · Broad Street
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9
Keep slight right to continue on Broad Street
867 ft · 15 sec · Broad Street
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10
Continue on Washington Street
2.3 mi · 3 min · Washington Street
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11
Continue on State Route 11
2.3 mi · 3 min · State Route 11
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12
Continue on John Stark Highway
4.6 mi · 5 min · John Stark Highway
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13
Continue on Elm Street
946 ft · 14 sec · Elm Street
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14
Continue on Maple Street
1358 ft · 41 sec · Maple Street
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15
Turn left onto Cross Street
144 m · 21 sec · Cross Street
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16
Turn right onto Canal Street
554 ft · 26 sec · Canal Street
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17
Turn right onto Sunapee Street
2.8 mi · 6 min · Sunapee Street
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18
Turn straight onto State Route 11
2.5 mi · 4 min · State Route 11
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19
Continue on Route 11
2097 ft · 60 sec · Route 11
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20
Continue on State Route 11
4.7 mi · 8 min · State Route 11
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21
Take the exit slight right
11 mi · 13 min
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22
Continue straight
23.8 mi · 28 min
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23
Take the exit slight right toward I 93 South Toll: Manchester, Boston
1 km · 1 min
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24
Merge slight right onto Everett Turnpike
5.7 mi · 7 min · Everett Turnpike
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25
Keep slight left to continue on Everett Turnpike
2 mi · 2 min · Everett Turnpike
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26
Keep slight right to continue on I 93 South: Salem, Boston
5.7 mi · 7 min
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27
Take the exit slight left toward NH 101 East: Seacoast, Portsmouth
1.2 km · 1 min
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28
Merge slight right
30.5 mi · 36 min
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29
Take the exit slight right toward I 95: Portsmouth, Boston
1.3 km · 2 min
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30
Keep slight left to continue on I 95 North: Portsmouth, Maine, Pease International Tradeport
2454 ft · 1 min
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31
Continue straight
1816 ft · 44 sec
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32
Merge slight left onto Blue Star Turnpike
7 mi · 8 min · Blue Star Turnpike
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33
Keep slight right to continue on Blue Star Turnpike
1.9 mi · 3 min · Blue Star Turnpike
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34
Take the exit slight right
1313 ft · 35 sec
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35
Turn right onto Market Street
1 mi · 2 min · Market Street
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36
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
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37
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Charlestown 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.
NH 101 East
Merge slight right
30.5 mi · 00h 36m
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 Charlestown 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 Charlestown to Portsmouth?
The road trip is about 123.3 miles (198.5 km) and usually takes 02h 16m 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 61.4 miles from Charlestown and 62 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 84.8 miles (136.4 km), while the road route adds roughly 38.5 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 1:58 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $18.68 one way or $37.36 round trip. Estimated CO2 is about 38.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Charlestown and Mostly Sunny near Portsmouth.
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 Charlestown and Portsmouth. Straight-line distance: 84.75 mi (136.39 km).
#1 Charlestown
Town in New Hampshire
| Population | 5,032 |
| Coordinates | 43.2386900, -72.4245300 |
| Altitude | 119 |
| 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: 199 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 06m |
| 40 mph (64.37 km/h) | 03h 05m |
| 50 mph (80.47 km/h) | 02h 28m |
| 60 mph (96.56 km/h) | 02h 03m |
| 70 mph (112.65 km/h) | 01h 45m |
| 80 mph (129 km/h) | 01h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.29 | $18.68 | $37.36 |
| Mid-grade | $4.88 | $21.25 | $42.49 |
| Premium | $5.34 | $23.22 | $46.43 |
| Diesel | $6.35 | $27.63 | $55.26 |
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