How far is Seattle, WA, from Portsmouth, NH?
The distance between Portsmouth (Portsmouth International Airport at Pease) and Seattle (Seattle–Tacoma International Airport) is 2483 miles / 3995 kilometers / 2157 nautical miles.
The driving distance from Portsmouth (PSM) to Seattle (SEA) is 2992 miles / 4815 kilometers, and travel time by car is about 55 hours 33 minutes.
Portsmouth International Airport at Pease – Seattle–Tacoma International Airport
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Distance from Portsmouth to Seattle
There are several ways to calculate the distance from Portsmouth to Seattle. Here are two standard methods:
Vincenty's formula (applied above)- 2482.638 miles
- 3995.419 kilometers
- 2157.354 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.
Haversine formula- 2475.804 miles
- 3984.420 kilometers
- 2151.415 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).
How long does it take to fly from Portsmouth to Seattle?
The estimated flight time from Portsmouth International Airport at Pease to Seattle–Tacoma International Airport is 5 hours and 12 minutes.
What is the time difference between Portsmouth and Seattle?
The time difference between Portsmouth and Seattle is 3 hours. Seattle is 3 hours behind Portsmouth.
Flight carbon footprint between Portsmouth International Airport at Pease (PSM) and Seattle–Tacoma International Airport (SEA)
On average, flying from Portsmouth to Seattle generates about 273 kg of CO2 per passenger, and 273 kilograms equals 602 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Portsmouth to Seattle
See the map of the shortest flight path between Portsmouth International Airport at Pease (PSM) and Seattle–Tacoma International Airport (SEA).
Airport information
| Origin | 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 |
| Destination | Seattle–Tacoma International Airport |
|---|---|
| City: | Seattle, WA |
| Country: | United States |
| IATA Code: | SEA |
| ICAO Code: | KSEA |
| Coordinates: | 47°26′56″N, 122°18′32″W |