How far is Seattle from Washington D.C.?
There are several ways to calculate distances between Washington D.C. and Seattle. Here are two common methods:Vincenty's formula (applied above)
- 2305.730 miles
- 3710.713 kilometers
- 2003.625 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
- 2300.088 miles
- 3701.633 kilometers
- 1998.722 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).
Estimated flight time from Washington Dulles International Airport (IAD) to Seattle–Tacoma International Airport (SEA) is 4 hours 51 minutes.
Time difference and current local times
The time difference between Washington D.C. and Seattle is 3 hours. Seattle is 3 hours behind Washington D.C..
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 257 kg (566 pounds).
|A||Washington Dulles International Airport|
|B||Seattle–Tacoma International Airport|
Washington D.C. to Seattle flight map.
Frequent Flyer Miles Calculator
Washington D.C. (IAD) → Seattle (SEA).