How far is Portsmouth, NH from Rochester, NH?
The driving distance from Portsmouth, NH to Rochester, NH is about 22.1 miles (35.6 km), with a travel time of about 00h 32m by car.
- The straight-line flight distance is about 19.2 miles (30.9 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.
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.
County seat city in Strafford County, New Hampshire, United States
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 Rochester.
Turn-by-Turn Driving Directions
Step-by-step road directions between Portsmouth and Rochester.
-
1
Start on Congress Street
954 ft · 34 sec · Congress Street
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2
Turn right onto Maplewood Avenue
1.1 km · 2 min · Maplewood Avenue
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3
Turn left onto Cutts Street
139 m · 16 sec · Cutts Street
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4
Turn slight right
1 km · 1 min
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5
Exit the rotary onto NH 16 North: Concord, Rochester
2261 ft · 51 sec
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6
Take the exit straight
961 ft · 15 sec
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7
Keep slight left to continue on Spaulding Turnpike North, NH 16 North, US 4 West
1364 ft · 21 sec
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8
Merge slight left onto Spaulding Turnpike
17.2 mi · 23 min · Spaulding Turnpike
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9
Take the exit slight right toward Old Dover Road, Rochester
1876 ft · 1 min · Exit 11
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10
Turn left onto Old Dover Road
2465 ft · 1 min · Old Dover Road
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11
Turn right onto Columbus Avenue
1.2 km · 2 min · Columbus Avenue
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12
Turn left onto South Main Street
1684 ft · 52 sec · South Main Street
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13
Turn right onto Museum Way
37 m · 5 sec · Museum Way
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14
Turn right
17 m · 4 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Portsmouth and Rochester.
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.
Spaulding Turnpike
Merge slight left onto Spaulding Turnpike
17.2 mi · 00h 23m
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.
Slight Chance Rain Showers then Partly Sunny leaving Portsmouth and Partly Sunny near Rochester.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Portsmouth to Rochester?
The road trip is about 22.1 miles (35.6 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?
Dover is a useful midpoint, sitting about 10.8 miles from Portsmouth and 11.4 miles from Rochester.
How much longer is the road route than the straight-line distance?
The direct path is about 19.2 miles (30.9 km), while the road route adds roughly 2.9 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 $3.08 one way or $6.15 round trip. Estimated CO2 is about 6.9 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 Rochester.
Stop Ideas Near Dover
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old City Hall
Dover City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Dover.
Dover Transportation Center
Durham–UNH station
Portsmouth, New Hampshire
Exeter station
Flight Path Map
This map shows the direct air route between Portsmouth and Rochester. Straight-line distance: 19.18 mi (30.86 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 Rochester
City in Strafford County, New Hampshire, United States
| Population | 31,719 |
| Coordinates | 43.3045300, -70.9756200 |
| Altitude | 70 |
| Country | United States |
End: (-70.975483, 43.304656)
Estimated Travel Time
Distance: 36 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 44m |
| 40 mph (64.37 km/h) | 00h 33m |
| 50 mph (80.47 km/h) | 00h 26m |
| 60 mph (96.56 km/h) | 00h 22m |
| 70 mph (112.65 km/h) | 00h 18m |
| 80 mph (129 km/h) | 00h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $3.08 | $6.15 |
| Mid-grade | $4.46 | $3.48 | $6.95 |
| Premium | $4.86 | $3.79 | $7.58 |
| Diesel | $6.00 | $4.68 | $9.36 |
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.