Air Miles Calculator

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

Distance from Washington Dulles International Airport to Seattle–Tacoma International Airport is 2306 miles / 3711 kilometers / 2004 nautical miles.

Calculations with different 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).

Flight duration

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..

Time Difference

Washington D.C.
Seattle

Washington D.C.

 EST

Seattle, WA

 PST

Airport information


A 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

B 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

Map

Flight map from Washington D.C. to Seattle.

Frequent Flyer Miles Calculator

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

Elite level bonus (%):
Booking class bonus (%):
Air miles:
2306
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2306

Round trip?