Air Miles Calculator

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

Distance from Washington D.C. to Seattle (Ronald Reagan Washington National Airport – Seattle–Tacoma International Airport) is 2328 miles / 3747 kilometers / 2023 nautical miles.

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)
  • 2328.467 miles
  • 3747.304 kilometers
  • 2023.382 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
  • 2322.777 miles
  • 3738.148 kilometers
  • 2018.438 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 Ronald Reagan Washington National Airport (DCA) to Seattle–Tacoma International Airport (SEA) is 4 hours 54 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

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 273 kg (602 pounds).

Airport information


A Ronald Reagan Washington National Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: DCA
ICAO Code: KDCA
Coordinates: 38°51′7″N, 77°2′15″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

Washington D.C. to Seattle flight map.

Frequent Flyer Miles Calculator

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

Elite level bonus (%):
Booking class bonus (%):
Air miles:
2328
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2328

Round trip?