How far is Keene, NH from Portsmouth, NH?
The driving distance from Keene, NH to Portsmouth, NH is about 107.1 miles (172.4 km), with a travel time of about 01h 49m by car.
- The straight-line flight distance is about 77.5 miles (124.7 km).
- For a round trip, plan for roughly 03h 39m 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 49m.
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.
City in Merrimack County, New Hampshire, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers
Light Rain
Driving Route Map
The map below follows the saved road route between Keene and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Keene and Portsmouth.
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1
Start on Roxbury Street
10 m · 4 sec · Roxbury Street
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2
Turn right onto Central Square
45 m · 3 sec · Central Square
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3
Keep slight right to continue on Washington Street
1.6 mi · 4 min · Washington Street
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4
Take the ramp slight right
599 ft · 12 sec
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5
Merge slight left onto Route 9
3.3 mi · 5 min · Route 9
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6
Continue on NH Route 9
1.5 mi · 3 min · NH Route 9
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7
Continue on Route 9
1.8 mi · 3 min · Route 9
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8
Continue on Franklin Pierce Highway
3.3 mi · 4 min · Franklin Pierce Highway
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9
Continue on Route 9
6.7 mi · 9 min · Route 9
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10
Continue on Keene Road
5.7 mi · 8 min · Keene Road
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11
Continue on West Main Street
1.9 mi · 3 min · West Main Street
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12
Turn straight onto Franklin Pierce Highway
16.3 mi · 22 min · Franklin Pierce Highway
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13
Merge slight left
7.9 mi · 10 min
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14
Take the exit slight right toward I 93 South Toll: Manchester, Boston
1 km · 1 min
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15
Merge slight right onto Everett Turnpike
5.7 mi · 7 min · Everett Turnpike
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16
Keep slight left to continue on Everett Turnpike
2 mi · 2 min · Everett Turnpike
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17
Keep slight right to continue on I 93 South: Salem, Boston
5.7 mi · 7 min
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18
Take the exit slight left toward NH 101 East: Seacoast, Portsmouth
1.2 km · 1 min
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19
Merge slight right
30.5 mi · 36 min
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20
Take the exit slight right toward I 95: Portsmouth, Boston
1.3 km · 2 min
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21
Keep slight left to continue on I 95 North: Portsmouth, Maine, Pease International Tradeport
2454 ft · 1 min
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22
Continue straight
1816 ft · 44 sec
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23
Merge slight left onto Blue Star Turnpike
7 mi · 8 min · Blue Star Turnpike
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24
Keep slight right to continue on Blue Star Turnpike
1.9 mi · 3 min · Blue Star Turnpike
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25
Take the exit slight right
1313 ft · 35 sec
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26
Turn right onto Market Street
1 mi · 3 min · Market Street
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27
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
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28
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Keene 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
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.
Rain Showers leaving Keene and Light Rain near Portsmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Keene to Portsmouth?
The road trip is about 107.1 miles (172.4 km) and usually takes 01h 49m 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?
Bow Bog is a useful midpoint, sitting about 53.5 miles from Keene and 53.6 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 77.5 miles (124.7 km), while the road route adds roughly 29.6 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 2:50 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.91 one way or $29.82 round trip. Estimated CO2 is about 33.6 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers around Keene and Light Rain near Portsmouth.
Stop Ideas Near Bow Bog
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 Bow Bog.
Concord, New Hampshire
Manchester, New Hampshire
Tilton, New Hampshire
Nashua, NH
Flight Path Map
This map shows the direct air route between Keene and Portsmouth. Straight-line distance: 77.46 mi (124.66 km).
#1 Keene
City in New Hampshire, United States
| Population | 22,699 |
| Coordinates | 42.9336900, -72.2781400 |
| Altitude | 148 |
| 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: 172 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 34m |
| 40 mph (64.37 km/h) | 02h 40m |
| 50 mph (80.47 km/h) | 02h 08m |
| 60 mph (96.56 km/h) | 01h 47m |
| 70 mph (112.65 km/h) | 01h 31m |
| 80 mph (129 km/h) | 01h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $14.91 | $29.82 |
| Mid-grade | $4.46 | $16.85 | $33.69 |
| Premium | $4.86 | $18.36 | $36.73 |
| Diesel | $6.00 | $22.67 | $45.34 |
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 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.