
Popular airlines from Seattle-Tacoma International Airport (SEA) to Washington Dulles International Airport (IAD)
- Alaska Airlines
Alaska Airlines
- United
United
- Delta
Delta
- American Airlines
American Airlines
- Southwest Airlines
Southwest Airlines
- Sun Country Airlines
Sun Country Airlines
- Frontier Airlines
Frontier Airlines
- Plan, book, fly with confidence
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Cheap Flights from Seattle (SEA) to Washington (IAD)
Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.










Find the cheapest month to fly from Seattle (SEA) to Washington (IAD)
September is typically the cheapest month to fly
Graph displaying average flight prices per month
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Washington Dulles Intl. |
Return price | AU$424 |
Distance | 3679 km |
Average flight time | 8 hours 4 mins |
Your quick guide to flights from Seattle to Washington
Pick up great flights from Seattle to Washington
With Expedia, you have your pick of 28 flights a day with 20 airlines covering flights from Seattle to Washington. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to Washington that take around 11 hours.
Find cheap flights from Seattle to Washington
From the great flight deals with prices currently ranging from AU$425 to AU$579, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to Washington around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Washington is normally in October.
Reasons to book your flight from Seattle to Washington with Expedia
Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to Washington across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Washington right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.
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Top Routes to Washington
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