Map of flight path and driving directions from Washington D.C. to Portsmouth.
Shortest flight path between Ronald Reagan Washington National Airport (DCA) and Portsmouth International Airport at Pease (PSM).
How far is Portsmouth from Washington D.C.?
There are several ways to calculate distances between Washington D.C. and Portsmouth. Here are two common 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 earth.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).
|A||Ronald Reagan Washington National Airport|
|B||Portsmouth International Airport at Pease|
Time difference and current local times
There is no time difference between Washington D.C. and Portsmouth.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 89 kg (197 pounds).
Frequent Flyer Miles Calculator
Washington D.C. (DCA) → Portsmouth (PSM).