How far is Portsmouth, NH, from Washington D.C.?
The distance between Washington D.C. (Ronald Reagan Washington National Airport) and Portsmouth (Portsmouth International Airport at Pease) is 436 miles / 702 kilometers / 379 nautical miles.
The driving distance from Washington D.C. (DCA) to Portsmouth (PSM) is 495 miles / 796 kilometers, and travel time by car is about 10 hours 14 minutes.
Ronald Reagan Washington National Airport – Portsmouth International Airport at Pease
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Distance from Washington D.C. to Portsmouth
There are several ways to calculate the distance from Washington D.C. to Portsmouth. Here are two standard methods:
Vincenty's formula (applied above)- 436.454 miles
- 702.404 kilometers
- 379.268 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- 436.086 miles
- 701.813 kilometers
- 378.948 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 Washington D.C. to Portsmouth?
The estimated flight time from Ronald Reagan Washington National Airport to Portsmouth International Airport at Pease is 1 hour and 19 minutes.
What is the time difference between Washington D.C. and Portsmouth?
There is no time difference between Washington D.C. and Portsmouth.
Flight carbon footprint between Ronald Reagan Washington National Airport (DCA) and Portsmouth International Airport at Pease (PSM)
On average, flying from Washington D.C. to Portsmouth generates about 89 kg of CO2 per passenger, and 89 kilograms equals 197 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Washington D.C. to Portsmouth
See the map of the shortest flight path between Ronald Reagan Washington National Airport (DCA) and Portsmouth International Airport at Pease (PSM).
Airport information
| Origin | Ronald Reagan Washington National Airport |
|---|---|
| City: | Washington D.C. |
| Country: | United States  |
| IATA Code: | DCA |
| ICAO Code: | KDCA |
| Coordinates: | 38°51′7″N, 77°2′15″W |
| Destination | 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 |