
Book Cheap Alaska Airlines flight from Seattle (SEA) to Washington (IAD) from CA $153
Find The Best Day to Book a Cheap Alaska Airlines Flights From Seattle to Washington
Cheapest Alaska Airlines Flights from Seattle (SEA) to Washington (IAD)
The cheapest flights to Washington Dulles Intl. found within the past 7 days were CA $279 round trip and CA $153 one way. Prices and availability subject to change. Additional terms may apply.
IAD From SEA Economy Coach Packages on Similar Airlines


Frequently asked questions
Grab a great Alaska Airlines flight from SEA to IAD
To find a great deal on Alaska Airlines flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights.
Flying Alaska Airlines Seattle to Chantilly gives you fights to choose from. With that direct flight time of , you’ll be touching down before you know it.
Find cheap flights with Alaska Airlines between Seattle and Chantilly
Alaska Airlines has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from Seattle to Chantilly with Alaska Airlines are April.
The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.
Reasons to book your Alaska Airlines flights with Travelocity
Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.
Airport code | Country | Airport name | Number of flights |
|---|---|---|---|
| SEA | USA | Seattle - Tacoma Intl. | 115 |
| ORD | USA | O'Hare Intl. | 44 |
| LAX | USA | Los Angeles Intl. | 24 |
| PDX | USA | Portland Intl. | 23 |
| ANC | USA | Ted Stevens Anchorage Intl. | 22 |
| SFO | USA | San Francisco Intl. | 21 |
| SAN | USA | San Diego Intl. | 18 |
| JNU | USA | Juneau Intl. | 10 |
| SJC | USA | Norman Y. Mineta San Jose Intl. | 10 |
| GEG | USA | Spokane Intl. | 7 |
Travelers ❤️ these 🏨 after their flight to Washington

Hyatt Regency Dulles International Airport
All was fine but when I arrived they charged me about $50 more than the Hotels.com quote
Reviewed on Mar 18, 2026

Hyatt Place Herndon Dulles Airport East
Clean rooms with spacious interior.
Reviewed on Mar 19, 2026

Washington Dulles Airport Marriott
yes
Reviewed on Mar 18, 2026
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