How far is Lancaster, NH from Portsmouth, NH?
The driving distance from Lancaster, NH to Portsmouth, NH is about 146.8 miles (236.3 km), with a travel time of about 02h 40m by car.
- The straight-line flight distance is about 105.6 miles (170 km).
- For a round trip, plan for roughly 05h 21m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EST.
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 40m.
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.
Human settlement in Belknap County, New Hampshire, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Lancaster and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lancaster and Portsmouth.
-
1
Start on Main Street
868 ft · 25 sec · Main Street
-
2
Turn slight right onto Prospect Street
6.3 mi · 9 min · Prospect Street
-
3
Continue on Lancaster Road
2 mi · 3 min · Lancaster Road
-
4
Continue on Daniel Webster Highway
142 m · 11 sec · Daniel Webster Highway
-
5
Continue on Twin Mountain Road
2.3 mi · 4 min · Twin Mountain Road
-
6
Continue on US Route 3 North
6.1 mi · 9 min · US Route 3 North
-
7
Continue on US Route 3 South
140 m · 15 sec · US Route 3 South
-
8
Turn slight right onto US Route 3 South
1.9 mi · 3 min · US Route 3 South
-
9
Continue on Daniel Webster Highway
7.8 mi · 12 min · Daniel Webster Highway
-
10
Take the ramp straight
8.2 mi · 13 min
-
11
Continue on Styles Bridges Highway
50.5 mi · 54 min · Styles Bridges Highway
-
12
Continue on Senator Styles Bridges Highway
15.4 mi · 18 min · Senator Styles Bridges Highway
-
13
Take the exit slight right toward I 393 East, US 4 East, US 202 East: Loudon, Portsmouth
10 mi · 16 min
-
14
Enter the roundabout and take exit 2 toward Epsom Circle
76 m · 6 sec · Dover Road
-
15
Exit the rotary onto Dover Road
4.3 mi · 7 min · Dover Road
-
16
Continue on First New Hampshire Turnpike
7.8 mi · 13 min · First New Hampshire Turnpike
-
17
Continue on Old Turnpike Road
5.1 mi · 7 min · Old Turnpike Road
-
18
Continue on Old Concord Turnpike
1.8 mi · 3 min · Old Concord Turnpike
-
19
Continue on Concord Road
2565 ft · 56 sec · Concord Road
-
20
Enter the roundabout and take exit 2 toward Lee Circle
50 m · 5 sec · Concord Road
-
21
Exit the rotary onto Concord Road
8.9 mi · 14 min · Concord Road
-
22
Continue on Scammell Bridge
1132 ft · 28 sec · Scammell Bridge
-
23
Continue on Boston Harbor Road
812 ft · 22 sec · Boston Harbor Road
-
24
Enter the roundabout and take exit 2 toward the route
54 m · 4 sec
-
25
Exit the roundabout
684 ft · 17 sec
-
26
Take the exit slight right
2827 ft · 1 min
-
27
Merge slight left onto Spaulding Turnpike
3.5 mi · 5 min · Spaulding Turnpike
-
28
Take the exit slight left toward I 95 North
1.5 km · 2 min
-
29
Enter the roundabout and take exit 3 toward Portsmouth Traffic Circle
692 ft · 20 sec
-
30
Exit the rotary onto US 1 Bypass North: Portsmouth, Woodbury Avenue
1.6 km · 2 min
-
31
Turn left onto Submarine Way
566 ft · 18 sec · Submarine Way
-
32
Turn right onto Market Street
1 km · 2 min · Market Street
-
33
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
-
34
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Lancaster 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.
Styles Bridges Highway
Continue on Styles Bridges Highway
50.5 mi · 00h 54m
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 Lancaster and Sunny near Portsmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lancaster to Portsmouth?
The road trip is about 146.8 miles (236.3 km) and usually takes 02h 40m 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?
New Hampton is a useful midpoint, sitting about 73.3 miles from Lancaster and 73.5 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 105.6 miles (170 km), while the road route adds roughly 41.2 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 EST. If you want a more comfortable same-day return, try to leave by 1:08 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.66 one way or $43.33 round trip. Estimated CO2 is about 46 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Lancaster and Sunny near Portsmouth.
Stop Ideas Near New Hampton
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 New Hampton.
New Hampton, New Hampshire
Plymouth, New Hampshire
Tilton, New Hampshire
Concord, New Hampshire
Flight Path Map
This map shows the direct air route between Lancaster and Portsmouth. Straight-line distance: 105.62 mi (169.98 km).
#1 Lancaster
Town in New Hampshire, United States
| Population | 3,234 |
| Coordinates | 44.4889500, -71.5692500 |
| Altitude | 263 |
| 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: 236 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 53m |
| 40 mph (64.37 km/h) | 03h 40m |
| 50 mph (80.47 km/h) | 02h 56m |
| 60 mph (96.56 km/h) | 02h 26m |
| 70 mph (112.65 km/h) | 02h 05m |
| 80 mph (129 km/h) | 01h 49m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.18 | $21.66 | $43.33 |
| Mid-grade | $4.80 | $24.87 | $49.75 |
| Premium | $5.26 | $27.23 | $54.46 |
| Diesel | $6.35 | $32.87 | $65.74 |
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 31, 2026