How far is Portsmouth, NH from Smithfield, RI?
The driving distance from Portsmouth, NH to Smithfield, RI is about 109.1 miles (175.5 km), with a travel time of about 02h 21m by car.
- The straight-line flight distance is about 89.4 miles (143.9 km).
- For a round trip, plan for roughly 04h 43m 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 02h 21m.
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 Middlesex County, Massachusetts, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Portsmouth and Smithfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Portsmouth and Smithfield.
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1
Start on Congress Street
124 m · 15 sec · Congress Street
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2
Turn right onto Fleet Street
141 m · 17 sec · Fleet Street
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3
Turn right onto Hanover Street
662 ft · 27 sec · Hanover Street
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4
At the end of the road, turn left onto Market Street
1 mi · 3 min · Market Street
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5
Take the ramp left toward I 95 South: Hampton, Boston
1468 ft · 36 sec
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6
Merge slight left
9 mi · 11 min
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7
Keep slight left to continue on Blue Star Turnpike
7.7 mi · 9 min · Blue Star Turnpike
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8
Keep slight right to continue on I 495 South: Worcester
30.6 mi · 36 min
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9
Take the exit slight right toward US 3: Burlington, Nashua New Hampshire
1068 ft · 14 sec
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10
Keep slight left to continue on US 3: Burlington, Nashua New Hampshire
1320 ft · 17 sec
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11
Keep slight left
1931 ft · 25 sec
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12
Keep slight left to continue on I 495 South: Marlboro
2589 ft · 34 sec
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13
Merge slight left
42.8 mi · 49 min
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14
Take the exit slight right toward MA 126: Medway, Bellingham
1449 ft · 53 sec
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15
Turn left onto Hartford Avenue
1250 ft · 43 sec · Hartford Avenue
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16
Turn left onto North Main Street
1.9 mi · 4 min · North Main Street
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17
Turn slight right
70 m · 9 sec
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18
Continue on South Main Street
4.6 mi · 8 min · South Main Street
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19
Turn right onto Pulaski Boulevard
1.2 km · 2 min · Pulaski Boulevard
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20
Continue on Social Street
1.2 mi · 2 min · Social Street
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21
Turn straight onto Main Street
1.4 km · 2 min · Main Street
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22
Turn left onto Providence Street
1.2 km · 1 min · Providence Street
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23
Continue on Greenville Road
4 mi · 8 min · Greenville Road
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24
Turn straight onto Douglas Turnpike
1052 ft · 18 sec · Douglas Turnpike
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25
Turn slight right onto Farnum Pike
1.3 mi · 2 min · Farnum Pike
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26
Turn left onto Brayton Road
7 m · 1 sec · Brayton Road
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27
Arrive at your destination
0 m · 1 sec · Brayton Road
Car Route Details
A richer read on the saved driving route between Portsmouth and Smithfield.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 495 South
Merge slight left
42.8 mi · 00h 49m
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.
Sunny leaving Portsmouth and Mostly Sunny near Smithfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Portsmouth to Smithfield?
The road trip is about 109.1 miles (175.5 km) and usually takes 02h 21m 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?
Westford is a useful midpoint, sitting about 54.5 miles from Portsmouth and 54.6 miles from Smithfield.
How much longer is the road route than the straight-line distance?
The direct path is about 89.4 miles (143.9 km), while the road route adds roughly 19.7 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 1:46 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $15.19 one way or $30.38 round trip. Estimated CO2 is about 34.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Portsmouth and Mostly Sunny near Smithfield.
Stop Ideas Near Westford
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 Westford.
Nashua, NH
Anderson Regional Transportation Center
Framingham station
Haverhill station
Flight Path Map
This map shows the direct air route between Portsmouth and Smithfield. Straight-line distance: 89.42 mi (143.9 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 Smithfield
County seat of Johnston County, North Carolina
| Population | 21,842 |
| Coordinates | 41.9220400, -71.5495100 |
| Altitude | 84 |
| Country | United States |
End: Smithfield (-71.54951, 41.92204)
Estimated Travel Time
Distance: 175 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 37m |
| 40 mph (64.37 km/h) | 02h 43m |
| 50 mph (80.47 km/h) | 02h 10m |
| 60 mph (96.56 km/h) | 01h 49m |
| 70 mph (112.65 km/h) | 01h 33m |
| 80 mph (129 km/h) | 01h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $15.19 | $30.38 |
| Mid-grade | $4.46 | $17.16 | $34.32 |
| Premium | $4.86 | $18.70 | $37.41 |
| Diesel | $6.00 | $23.09 | $46.18 |
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 · Jul 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.