# 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
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
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.

PDT

EDT

## 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?