How far is Amherst, NH from Portsmouth, NH?
The driving distance from Amherst, NH to Portsmouth, NH is about 60.1 miles (96.8 km), with a travel time of about 01h 04m by car.
- The straight-line flight distance is about 46.4 miles (74.6 km).
- For a round trip, plan for roughly 02h 08m 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 04m.
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.
Partly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Amherst and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Amherst and Portsmouth.
-
1
Start on Amherst Street
1.3 km · 2 min · Amherst Street
-
2
Take the ramp left
1254 ft · 35 sec
-
3
Merge slight left
2.9 mi · 4 min
-
4
Continue straight
6.3 mi · 10 min
-
5
Take the exit slight right
6.9 mi · 9 min
-
6
Keep slight right to continue on NH 101 East: Portsmouth, Seacoast
31.3 mi · 37 min
-
7
Take the exit slight right toward I 95: Portsmouth, Boston
1.3 km · 2 min
-
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
-
10
Merge slight left onto Blue Star Turnpike
7 mi · 8 min · Blue Star Turnpike
-
11
Keep slight right to continue on Blue Star Turnpike
1.9 mi · 3 min · Blue Star Turnpike
-
12
Take the exit slight right
1313 ft · 35 sec
-
13
Turn right onto Market Street
1 mi · 3 min · Market Street
-
14
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
-
15
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Amherst and Portsmouth.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
NH 101 East
Keep slight right to continue on NH 101 East: Portsmouth, Seacoast
31.3 mi · 00h 37m
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.
Partly Sunny leaving Amherst 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 Amherst to Portsmouth?
The road trip is about 60.1 miles (96.8 km) and usually takes 01h 04m 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 30 miles from Amherst and 30.1 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 46.4 miles (74.6 km), while the road route adds roughly 13.7 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 4:22 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $8.36 one way or $16.73 round trip. Estimated CO2 is about 18.8 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Amherst 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 Amherst and Portsmouth. Straight-line distance: 46.33 mi (74.56 km).
#1 Amherst
Town in Hillsborough County, New Hampshire, United States
| Population | 11,418 |
| Coordinates | 42.8614700, -71.6253500 |
| Altitude | 79 |
| 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: 97 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 00m |
| 40 mph (64.37 km/h) | 01h 30m |
| 50 mph (80.47 km/h) | 01h 12m |
| 60 mph (96.56 km/h) | 01h 00m |
| 70 mph (112.65 km/h) | 00h 51m |
| 80 mph (129 km/h) | 00h 45m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $8.36 | $16.73 |
| Mid-grade | $4.46 | $9.45 | $18.90 |
| Premium | $4.86 | $10.30 | $20.60 |
| Diesel | $6.00 | $12.71 | $25.43 |
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 25, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.