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).
Time difference and current local times
The time difference between Spokane and Portsmouth is 3 hours. Portsmouth is 3 hours ahead of Spokane.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 247 kg (546 pounds).
Frequent Flyer Miles Calculator
Spokane (GEG) → Portsmouth (PSM).