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

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

Driving distance from Washington D.C. (IAD) to Seattle (SEA) is 2797 miles / 4502 kilometers and travel time by car is about 49 hours 24 minutes.

Washington D.C. – Seattle

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2306
Miles
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3711
Kilometers
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2004
Nautical miles

How far is Seattle from Washington D.C.?

There are several ways to calculate distances between Los Angeles and Chicago. 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).

Flight Duration

Estimated flight time from Washington Dulles International Airport to Seattle–Tacoma International Airport is 4 hours 51 minutes.

Time difference

The time difference between Washington D.C. and Seattle is 3 hours. Seattle is 3 hours behind Washington D.C..
Washington D.C. time to Seattle time converter

Carbon dioxide emissions

On average flying from Washington D.C. to Seattle generates about 253 kg of CO2 per passenger, 253 kilograms is equal to 557 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Washington D.C. to Seattle

Shortest flight path between Washington Dulles International Airport (IAD) and Seattle–Tacoma International Airport (SEA).

Airport information

Origin 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
Destination 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

Airlines flying from Washington D.C. (IAD) to Seattle (SEA)

United Airlines