Cheap IAD to Seattle flights

Book your IAD to SEA flights with Expedia and find last-minute Washington, DC to Seattle airfare. Expedia offers discount airfare on multiple airline carriers that fly direct and indirect routes between IAD and SEA, with new flight deals and promotions almost daily. When you book your next trip from Washington Dulles Intl. to Seattle Tacoma Intl. with Expedia, you can rest assured you’re getting great ticket prices and excellent service from one of the world’s most trusted travel providers.

Popular Flights from Washington, DC, District of Columbia

Browse popular flight destinations from Washington, DC (IAD), and plan your next exciting trip. Expedia has cheap flights from Washington, DC on multiple airline carriers, so book your next trip today!

IAD to SEA Route Map

Washington, DC to Seattle Flights, Stats and Airplanes

Route information for flights from Washington Dulles Intl. to Seattle Tacoma Intl..

Distance:
2,299.97 miles

Airline carriers and aircraft used on flights from IAD to SEA

Airline Carrier

Continental Airlines
Continental Airlines
Continental Airlines
United Airlines
United Airlines
United Airlines
US Airways
US Airways
US Airways

Aircraft

Airbus A319
Airbus A320-100/200
Boeing 757-200 pax
Airbus A319
Airbus A320-100/200
Boeing 757-200 pax
Airbus A319
Airbus A320-100/200
Boeing 757-200 pax

IAD - Washington Dulles Intl. Airlines

Browse the most popular airlines servicing the Washington, DC (IAD) airport. Visit their flights pages to learn more about the most popular routes these carriers fly.

SEA - Seattle Tacoma Intl. Airlines

Browse the most popular airlines servicing the Seattle (SEA) airport. Visit their flights pages to learn more about the most popular routes these carriers fly.

Interesting Facts About Flights from Washington, DC to Seattle (IAD to SEA)

  • Flight #917, operated by UNITED, was the flight with the most delays in 2009, with 3 minutes average delay between flights from Washington to Seattle.
  • UNITED operated flights from IAD to SEA using 5 types of aircraft in 2009.
  • UNITED carried a total of 145,186 passengers from IAD to SEA in 2009.
  • The average flight time from Washington, DC to Seattle, WA takes about 310 minutes.
  • 167,823 seats were available on flights from IAD to SEA in 2009. Of those seats, a total of 145,186 passengers flew on all flights from IAD to SEA that year.
  • The smallest aircraft servicing flights from IAD to SEA for UNITED is the A319 built by Airbus Industrie with 120 seats.
  • There were 145,186 passengers that flew from Washington to Seattle in 2009.
  • The oldest aircraft servicing trips from Washington, DC to Seattle, WA in 2009 was UNITED's B757-2 from Boeing which started flying in 1990.
  • UNITED operates the shortest flights from Washington to Seattle.
  • UNITED offers the shortest flight times from Washington to Seattle.
  • UNITED offers flights from Washington, DC to Seattle, WA.
  • The average aircraft occupancy on flights from Washington to Seattle in 2009 was 86.27%.
  • In 2009, there was just one airline company serving flights from Washington to Seattle.
  • The largest aircraft servicing flights between Washington and Seattle from UNITED is the B777-2 built by Boeing with 258 seats.
  • The shortest flight between IAD and SEA takes about 310 minutes.
  • The newest aircraft servicing IAD to SEA in 2009 was UNITED's A319 from Airbus Industrie. The A319 started flying in 1997.
  • The shortest flight distance between Washington and Seattle is 2306 miles.

(Source: FAA & BTS 2009 Databases)