Air Miles Calculator

Distance between Seattle, WA (BFI) and Portsmouth, NH (PSM)

Distance from Seattle to Portsmouth (Boeing Field – Portsmouth International Airport at Pease) is 2481 miles / 3993 kilometers / 2156 nautical miles.

How far is Portsmouth from Seattle?

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

Vincenty's formula (applied above)
  • 2481.110 miles
  • 3992.959 kilometers
  • 2156.025 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
  • 2474.278 miles
  • 3981.965 kilometers
  • 2150.089 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).

Flight duration

Estimated flight time from Boeing Field (BFI) to Portsmouth International Airport at Pease (PSM) is 5 hours 11 minutes.

Time difference and current local times

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

Time Difference

Seattle
Portsmouth

Seattle, WA

 PDT

Portsmouth, NH

 EDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 277 kg (611 pounds).

Airport information


A Boeing Field
City: Seattle, WA
Country: United States Flag of United States
IATA Code: BFI
ICAO Code: KBFI
Coordinates: 47°31′47″N, 122°18′7″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

Seattle to Portsmouth flight path

Shortest flight path between Boeing Field (BFI) and Portsmouth International Airport at Pease (PSM).

Frequent Flyer Miles Calculator

Seattle (BFI) → Portsmouth (PSM).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
2481
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2481

Round trip?