Cheap Flights from Seattle (SEA) to Washington (IAD)

Popular airlines from Seattle-Tacoma International Airport (SEA) to Washington Dulles Intl. Airport (IAD)

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Frequently asked questions

How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to IAD?
With Alaska Airlines, a direct flight takes around 4 hours and 56 minutes. Step on board the 4:03PM flight from Sea-Tac Airport and reach Dulles Intl. Airport at 11:59PM. Snag an epic deal on this and other routes when you use Expedia to book your trip.
Is it cheaper to buy a plane ticket from Sea-Tac Airport to Dulles Intl. Airport last minute?
When it comes to booking your flights, it pays to be prepared. While it may be possible to pick up a last-minute deal on a Sea-Tac Airport to Washington Dulles Intl. Airport (IAD) flight, tickets usually don't get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days in advance. For international travel it's between three and four months.
What airline has the least delays from SEA to Dulles Intl. Airport?
Achieving an on-time rate of 88%, Alaska Airlines is the airline that's likelier to fly you from Sea-Tac Airport to Washington Dulles Intl. Airport (IAD) without any hiccups. Flight delays aren't just annoying — they can also cause you to miss a vital connection that upends your entire trip. You can prepare for delays by reviewing your flight status through the free Expedia App before you even reach the airport. If you're already there and you're worried about how the disruption will affect your trip, visit your airline's customer service desk for more information.
What airports do you fly into for Washington from Seattle?
Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) are your choices when taking off from Seattle to Washington. Approximately 40 kilometers west of central Washington, Washington Dulles Intl. Airport (IAD) is the city's principal entry point. Think about factors such as flight arrival and departure times and the distance to your hotel before you select an airport. White House and United States Capitol are a couple of fantastic attractions to visit when you arrive.
What are the most popular departure times for flights from Sea-Tac Airport to IAD?
Between 8:00 AM - 9:00 AM is when you'll find the most Delta Air Lines flights departing SEA to Washington Dulles Intl. Airport (IAD). Our handy tip? Leave early. With air traffic yet to build up around airports, your chances of jumping on a delay-free flight are higher.
Can I change the date of my flight from Sea-Tac Airport to Dulles Intl. Airport?
It's easy to make changes to your SEA to Dulles Intl. Airport trip yourself. Simply go to the Expedia Trips portal and click on "change flight." Search for new flights and lock in the one that works with your new plans. You'll get an estimate of applicable flight change fees. Alternatively, visit our Customer Service portal to connect with our Virtual Agent and get answers to all your questions.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Washington Dulles Intl.
Distance
3679 km
Average flight time
7 hours 57 mins

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Seattle to Washington Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Seattle to Washington offer the perfect respite. Not only does exploring Washington provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Seattle to Washington may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from to today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Washington are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Washington more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Washington is now!

Seattle to Washington Flights

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