How far is Key West, FL, from Portsmouth, NH?
The distance between Portsmouth (Portsmouth International Airport at Pease) and Key West (Key West International Airport) is 1420 miles / 2286 kilometers / 1234 nautical miles.
The driving distance from Portsmouth (PSM) to Key West (EYW) is 1703 miles / 2741 kilometers, and travel time by car is about 33 hours 17 minutes.
Portsmouth International Airport at Pease – Key West International Airport
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Distance from Portsmouth to Key West
There are several ways to calculate the distance from Portsmouth to Key West. Here are two standard methods:
Vincenty's formula (applied above)- 1420.217 miles
- 2285.618 kilometers
- 1234.135 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- 1422.450 miles
- 2289.212 kilometers
- 1236.076 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 Key West?
The estimated flight time from Portsmouth International Airport at Pease to Key West International Airport is 3 hours and 11 minutes.
What is the time difference between Portsmouth and Key West?
There is no time difference between Portsmouth and Key West.
Flight carbon footprint between Portsmouth International Airport at Pease (PSM) and Key West International Airport (EYW)
On average, flying from Portsmouth to Key West generates about 174 kg of CO2 per passenger, and 174 kilograms equals 385 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 Key West
See the map of the shortest flight path between Portsmouth International Airport at Pease (PSM) and Key West International Airport (EYW).
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 | Key West International Airport |
|---|---|
| City: | Key West, FL |
| Country: | United States |
| IATA Code: | EYW |
| ICAO Code: | KEYW |
| Coordinates: | 24°33′21″N, 81°45′34″W |