How far is Brentwood, NH from Portsmouth, NH?
The driving distance from Brentwood, NH to Portsmouth, NH is about 27.3 miles (43.9 km), with a travel time of about 00h 32m by car.
- The straight-line flight distance is about 17.3 miles (27.9 km).
- For a round trip, plan for roughly 01h 05m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 32m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in Rockingham County, New Hampshire, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Brentwood and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Brentwood and Portsmouth.
-
1
Start on Crawley Falls Road
43 m · 9 sec · Crawley Falls Road
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2
Turn right onto Middle Road
88 m · 10 sec · Middle Road
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3
Turn right onto Officer Stephen Arkell Memorial Highway
3.1 mi · 4 min · Officer Stephen Arkell Memorial Highway
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4
Continue on Calef Highway
1863 ft · 45 sec · Calef Highway
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5
Take the exit right
1410 ft · 34 sec
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6
Merge slight left
11.7 mi · 14 min
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7
Take the exit slight right toward I 95: Portsmouth, Boston
1.3 km · 2 min
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8
Keep slight left to continue on I 95 North: Portsmouth, Maine, Pease International Tradeport
2454 ft · 1 min
-
9
Continue straight
1816 ft · 44 sec
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10
Merge slight left onto Blue Star Turnpike
7 mi · 8 min · Blue Star Turnpike
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11
Keep slight right to continue on Blue Star Turnpike
1.9 mi · 3 min · Blue Star Turnpike
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12
Take the exit slight right
1313 ft · 35 sec
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13
Turn right onto Market Street
1 mi · 3 min · Market Street
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14
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
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15
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Brentwood 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.
Calef Highway
Merge slight left
11.7 mi · 00h 14m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Mostly Sunny leaving Brentwood 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 Brentwood to Portsmouth?
The road trip is about 27.3 miles (43.9 km) and usually takes 00h 32m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Exeter is a useful midpoint, sitting about 13.6 miles from Brentwood and 13.7 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 17.3 miles (27.9 km), while the road route adds roughly 10 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 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:24 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.79 one way or $7.57 round trip. Estimated CO2 is about 8.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Brentwood and Mostly Sunny near Portsmouth.
Stop Ideas Near Exeter
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old City Hall
Portsmouth City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Exeter.
Exeter station
Portsmouth, New Hampshire
Durham–UNH station
Newburyport, Massachusetts
Flight Path Map
This map shows the direct air route between Brentwood and Portsmouth. Straight-line distance: 17.31 mi (27.86 km).
#1 Brentwood
Town in New Hampshire
| Population | 4,612 |
| Coordinates | 42.9787000, -71.0728400 |
| Altitude | 35 |
| 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: 44 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 54m |
| 40 mph (64.37 km/h) | 00h 40m |
| 50 mph (80.47 km/h) | 00h 32m |
| 60 mph (96.56 km/h) | 00h 27m |
| 70 mph (112.65 km/h) | 00h 23m |
| 80 mph (129 km/h) | 00h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $3.79 | $7.57 |
| Mid-grade | $4.46 | $4.28 | $8.56 |
| Premium | $4.86 | $4.66 | $9.33 |
| Diesel | $6.00 | $5.76 | $11.51 |
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 · May 01, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.