How far is New Boston, NH from Portsmouth, NH?
The driving distance from New Boston, NH to Portsmouth, NH is about 63.9 miles (102.9 km), with a travel time of about 01h 12m by car.
- The straight-line flight distance is about 47.8 miles (76.9 km).
- For a round trip, plan for roughly 02h 25m 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 12m.
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.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between New Boston and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between New Boston and Portsmouth.
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1
Start on Old Coach Road
67 m · 11 sec · Old Coach Road
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2
Turn left onto Mont Vernon Road
24 m · 2 sec · Mont Vernon Road
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3
Turn slight right onto Old Coach Road
134 m · 15 sec · Old Coach Road
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4
Turn left onto River Road
4.8 mi · 9 min · River Road
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5
Continue on New Boston Road
1.3 mi · 3 min · New Boston Road
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6
Continue on Pleasant Street
1982 ft · 1 min · Pleasant Street
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7
Enter the roundabout and take exit 2 toward Main Street
7 m · 1 sec · Main Street
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8
Exit the rotary onto Main Street
41 m · 5 sec · Main Street
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9
Continue on South Mast Street
3219 ft · 2 min · South Mast Street
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10
Enter the roundabout and take exit 2 toward South Mast Street
31 m · 3 sec · South Mast Street
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11
Exit the roundabout onto South Mast Street
1.1 km · 1 min · South Mast Street
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12
Continue on Mast Road
4.3 mi · 9 min · Mast Road
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13
Turn left onto Pinard Street
1225 ft · 34 sec · Pinard Street
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14
Continue on Nazaire Biron Bridge
905 ft · 25 sec · Nazaire Biron Bridge
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15
Continue on Kelley Street
1.5 km · 2 min · Kelley Street
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16
At the end of the road, turn right onto Coolidge Avenue
757 ft · 25 sec · Coolidge Avenue
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17
At the end of the road, turn left onto Amory Street
154 m · 16 sec · Amory Street
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18
Continue on West Bridge Street
2 mi · 5 min · West Bridge Street
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19
Take the ramp left toward I 93 South
2288 ft · 1 min
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20
Merge slight left
1672 ft · 26 sec
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21
Take the exit slight left toward NH 101 East: Seacoast, Portsmouth
1.2 km · 1 min
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22
Merge slight right
30.5 mi · 36 min
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23
Take the exit slight right toward I 95: Portsmouth, Boston
1.3 km · 2 min
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24
Keep slight left to continue on I 95 North: Portsmouth, Maine, Pease International Tradeport
2454 ft · 1 min
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25
Continue straight
1816 ft · 44 sec
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26
Merge slight left onto Blue Star Turnpike
7 mi · 8 min · Blue Star Turnpike
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27
Keep slight right to continue on Blue Star Turnpike
1.9 mi · 3 min · Blue Star Turnpike
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28
Take the exit slight right
1313 ft · 35 sec
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29
Turn right onto Market Street
1 mi · 3 min · Market Street
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30
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
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31
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between New Boston and Portsmouth.
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.
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 New Boston 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 New Boston to Portsmouth?
The road trip is about 63.9 miles (102.9 km) and usually takes 01h 12m 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?
Raymond is a useful midpoint, sitting about 29.8 miles from New Boston and 34.1 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 47.8 miles (76.9 km), while the road route adds roughly 16.1 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 4:04 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $8.92 one way or $17.83 round trip. Estimated CO2 is about 20.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around New Boston and Mostly Sunny near Portsmouth.
Stop Ideas Near Raymond
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 Raymond.
Exeter station
Durham–UNH station
Manchester, New Hampshire
Haverhill station
Flight Path Map
This map shows the direct air route between New Boston and Portsmouth. Straight-line distance: 47.8 mi (76.93 km).
#1 New Boston
City in Texas, United States
| Population | 5,941 |
| Coordinates | 42.9761900, -71.6939600 |
| Altitude | 135 |
| 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: 103 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 07m |
| 40 mph (64.37 km/h) | 01h 35m |
| 50 mph (80.47 km/h) | 01h 16m |
| 60 mph (96.56 km/h) | 01h 03m |
| 70 mph (112.65 km/h) | 00h 54m |
| 80 mph (129 km/h) | 00h 47m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $8.92 | $17.83 |
| Mid-grade | $4.46 | $10.07 | $20.15 |
| Premium | $4.86 | $10.98 | $21.96 |
| Diesel | $6.00 | $13.55 | $27.11 |
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 · Jun 02, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.