Air Miles Calculator

Distance between Spokane, WA (GEG) and Portsmouth, NH (PSM)

Flight distance from Spokane to Portsmouth (Spokane International Airport – Portsmouth International Airport at Pease) is 2261 miles / 3639 kilometers / 1965 nautical miles. Estimated flight time is 4 hours 46 minutes.

Driving distance from Spokane (GEG) to Portsmouth (PSM) is 2768 miles / 4454 kilometers and travel time by car is about 47 hours 39 minutes.

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

Shortest flight path between Spokane International Airport (GEG) and Portsmouth International Airport at Pease (PSM).

How far is Portsmouth from Spokane?

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

Vincenty's formula (applied above)
  • 2261.177 miles
  • 3639.011 kilometers
  • 1964.909 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
  • 2254.972 miles
  • 3629.026 kilometers
  • 1959.517 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 Spokane International Airport
City: Spokane, WA
Country: United States Flag of United States
IATA Code: GEG
ICAO Code: KGEG
Coordinates: 47°37′11″N, 117°32′2″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

The time difference between Spokane and Portsmouth is 3 hours. Portsmouth is 3 hours ahead of Spokane.

Time Difference

Spokane, WA

 PST

Portsmouth, NH

 EST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 247 kg (546 pounds).

Frequent Flyer Miles Calculator

Spokane (GEG) → Portsmouth (PSM).

Distance:
2261
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2261

Round trip?