Air Miles Calculator

Distance between Seattle, WA (SEA) and Washington D.C. (IAD)

Flight distance from Seattle to Washington D.C. (Seattle–Tacoma International Airport – Washington Dulles International Airport) is 2306 miles / 3711 kilometers / 2004 nautical miles. Estimated flight time is 4 hours 51 minutes.

Driving distance from Seattle (SEA) to Washington D.C. (IAD) is 2795 miles / 4498 kilometers and travel time by car is about 46 hours 20 minutes.

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).

Airport information


A Seattle–Tacoma International Airport
City: Seattle, WA
Country: United States Flag of United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″W

B Washington Dulles International Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: IAD
ICAO Code: KIAD
Coordinates: 38°56′40″N, 77°27′20″W

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.

Time Difference

Seattle, WA

 PDT

Washington D.C.

 EDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 253 kg (557 pounds).

Frequent Flyer Miles Calculator

Seattle (SEA) → Washington D.C. (IAD).

Distance:
2306
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2306

Round trip?