Map of flight path and driving directions from Seattle to Washington D.C..
Shortest flight path between Seattle–Tacoma International Airport (SEA) and Washington Dulles International Airport (IAD).
How far is Washington D.C. from Seattle?
There are several ways to calculate distances between Seattle and Washington D.C.. 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).
|A||Seattle–Tacoma International Airport|
|B||Washington Dulles International Airport|
Time difference and current local times
The time difference between Seattle and Washington D.C. is 3 hours. Washington D.C. is 3 hours ahead of Seattle.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 253 kg (557 pounds).
Frequent Flyer Miles Calculator
Seattle (SEA) → Washington D.C. (IAD).