How far is Washington D.C. from Portsmouth, NH?
The distance between Portsmouth (Portsmouth International Airport at Pease) and Washington D.C. (Ronald Reagan Washington National Airport) is 436 miles / 702 kilometers / 379 nautical miles.
The driving distance from Portsmouth (PSM) to Washington D.C. (DCA) is 496 miles / 798 kilometers, and travel time by car is about 10 hours 16 minutes.
Portsmouth International Airport at Pease – Ronald Reagan Washington National Airport
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Distance from Portsmouth to Washington D.C.
There are several ways to calculate the distance from Portsmouth to Washington D.C.. 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 Portsmouth to Washington D.C.?
The estimated flight time from Portsmouth International Airport at Pease to Ronald Reagan Washington National Airport is 1 hour and 19 minutes.
What is the time difference between Portsmouth and Washington D.C.?
There is no time difference between Portsmouth and Washington D.C..
Flight carbon footprint between Portsmouth International Airport at Pease (PSM) and Ronald Reagan Washington National Airport (DCA)
On average, flying from Portsmouth to Washington D.C. 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 Portsmouth to Washington D.C.
See the map of the shortest flight path between Portsmouth International Airport at Pease (PSM) and Ronald Reagan Washington National Airport (DCA).
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 | 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 |