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.
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Seattle - Portsmouth
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, WA
Portsmouth, NH
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 277 kg (611 pounds).
Airport information
| A | Boeing Field |
|---|---|
| City: | Seattle, WA |
| Country: | 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 |
| 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).
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