How far is Thornton, NH from Dover, NH?
The driving distance from Thornton, NH to Dover, NH is about 90 miles (144.8 km), with a travel time of about 01h 39m by car.
- The straight-line flight distance is about 62.6 miles (100.8 km).
- For a round trip, plan for roughly 03h 19m 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 39m.
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 Belknap County, New Hampshire, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Snow Showers then Mostly Cloudy
Slight Chance Rain Showers then Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Thornton and Dover.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Dover.
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1
Start on Daniel Webster Highway
1.9 mi · 3 min · Daniel Webster Highway
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2
Take the ramp slight right toward I 93 South
2000 ft · 49 sec
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3
Merge slight left onto Styles Bridges Highway
31.3 mi · 34 min · Styles Bridges Highway
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4
Take the exit slight right toward US 3, NH 11: Laconia, Tilton
1853 ft · 55 sec
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5
At the end of the road, turn left onto Laconia Road
1546 ft · 47 sec · Laconia Road
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6
Turn right onto Tilton Road
1.8 mi · 3 min · Tilton Road
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7
Continue on Depot Street
2.9 mi · 5 min · Depot Street
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8
Continue on Main Street
1094 ft · 31 sec · Main Street
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9
Continue on State Route 140
1135 ft · 34 sec · State Route 140
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10
Continue on Gilmanton Road
1.9 mi · 3 min · Gilmanton Road
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11
Continue on New Hampshire Route 140
10 mi · 18 min · New Hampshire Route 140
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12
Continue on Frank C. Gilman Highway
3.7 mi · 7 min · Frank C. Gilman Highway
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13
Continue on Factory Street
2617 ft · 1 min · Factory Street
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14
At the end of the road, turn right onto Main Street
3036 ft · 1 min · Main Street
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15
Enter the roundabout and take exit 2 toward the route
605 ft · 17 sec
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16
Exit the roundabout
14.5 mi · 22 min
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17
Take the exit slight right
552 ft · 16 sec
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18
Continue on NH 16 On-Ramp South
1625 ft · 25 sec · NH 16 On-Ramp South
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19
Merge slight left onto Spaulding Turnpike
8.7 mi · 11 min · Spaulding Turnpike
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20
Take the exit slight right toward NH 9, NH 108: Dover, Somersworth
1388 ft · 36 sec
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21
At the end of the road, turn left onto Indian Brook Drive
2858 ft · 1 min · Indian Brook Drive
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22
Turn left onto Sixth Street
1.6 mi · 4 min · Sixth Street
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23
Turn right onto Central Avenue
978 ft · 30 sec · Central Avenue
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24
Turn left
35 m · 5 sec
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25
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Thornton and Dover.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Styles Bridges Highway
Merge slight left onto Styles Bridges Highway
31.3 mi · 00h 34m
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.
Slight Chance Snow Showers then Mostly Cloudy leaving Thornton and Slight Chance Rain Showers then Mostly Cloudy near Dover.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Dover?
The road trip is about 90 miles (144.8 km) and usually takes 01h 39m 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?
Gilmanton is a useful midpoint, sitting about 41.1 miles from Thornton and 48.8 miles from Dover.
How much longer is the road route than the straight-line distance?
The direct path is about 62.6 miles (100.8 km), while the road route adds roughly 27.4 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 3:10 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.55 one way or $25.09 round trip. Estimated CO2 is about 28.3 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Snow Showers then Mostly Cloudy around Thornton and Slight Chance Rain Showers then Mostly Cloudy near Dover.
Stop Ideas Near Gilmanton
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 Gilmanton.
Tilton, New Hampshire
Concord, New Hampshire
New Hampton, New Hampshire
Plymouth, New Hampshire
Flight Path Map
This map shows the direct air route between Thornton and Dover. Straight-line distance: 62.61 mi (100.76 km).
#1 Thornton
Town in Grafton County, New Hampshire, United States
| Population | 2,553 |
| Coordinates | 43.8928500, -71.6759100 |
| Altitude | 184 |
| Country | United States |
#2 Dover
County seat city in Strafford County, New Hampshire, United States
| Population | 32,443 |
| Coordinates | 43.1978600, -70.8736700 |
| Altitude | 19 |
| Country | United States |
End: (-70.873668, 43.197876)
Estimated Travel Time
Distance: 145 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 59m |
| 40 mph (64.37 km/h) | 02h 14m |
| 50 mph (80.47 km/h) | 01h 47m |
| 60 mph (96.56 km/h) | 01h 29m |
| 70 mph (112.65 km/h) | 01h 17m |
| 80 mph (129 km/h) | 01h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $12.55 | $25.09 |
| Mid-grade | $4.46 | $14.17 | $28.35 |
| Premium | $4.86 | $15.45 | $30.90 |
| Diesel | $6.00 | $19.07 | $38.14 |
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.