Air Miles Calculator

Distance between Watertown, NY (ART) and Portsmouth, NH (PSM)

Flight distance from Watertown to Portsmouth (Watertown International Airport – Portsmouth International Airport at Pease) is 269 miles / 432 kilometers / 233 nautical miles. Estimated flight time is 1 hour 0 minutes.

Driving distance from Watertown (ART) to Portsmouth (PSM) is 405 miles / 652 kilometers and travel time by car is about 7 hours 58 minutes.

Map of flight path and driving directions from Watertown to Portsmouth.

Shortest flight path between Watertown International Airport (ART) and Portsmouth International Airport at Pease (PSM).

How far is Portsmouth from Watertown?

There are several ways to calculate distances between Watertown and Portsmouth. Here are two common methods:

Vincenty's formula (applied above)
  • 268.557 miles
  • 432.201 kilometers
  • 233.370 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
  • 267.883 miles
  • 431.116 kilometers
  • 232.784 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

Airport information


A Watertown International Airport
City: Watertown, NY
Country: United States Flag of United States
IATA Code: ART
ICAO Code: KART
Coordinates: 43°59′30″N, 76°1′18″W

B Portsmouth International Airport at Pease
City: Portsmouth, NH
Country: United States Flag of United States
IATA Code: PSM
ICAO Code: KPSM
Coordinates: 43°4′40″N, 70°49′23″W

Time difference and current local times

There is no time difference between Watertown and Portsmouth.

Time Difference

Watertown, NY

 EDT

Portsmouth, NH

 EDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 65 kg (142 pounds).

Frequent Flyer Miles Calculator

Watertown (ART) → Portsmouth (PSM).

Distance:
269
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
269

Round trip?