Question 1

How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Sea-Tac Airport?

Accepted Answer

Book your trip with Alaska Airlines and you'll be cruising the skies for roughly 5 hours and 40 minutes. This leading airline operates a direct flight that sets off at 7:40AM from Washington Dulles Intl. Airport (IAD) and arrives at SEA at 10:20AM. Expedia has some epic flight deals, so take a peek at what's available on this route today.

Question 2

Is it cheaper to buy a plane ticket from Dulles Intl. Airport to Sea-Tac Airport last minute?

Accepted Answer

Booking your trip from Dulles Intl. Airport to Seattle - Tacoma Intl. Airport (SEA) at the last minute could help you save if you stumble on an awesome deal. However, fares usually don't drop in price closer to the departure date. If you hold off, flights could also be booked up or the best seats taken (don't get stuck in the middle!). If you'd rather play it safe, book well ahead of when you want to leave. In fact, you can find some of the biggest deals up to a year in advance. If your favorite airline hasn't released tickets yet, check back regularly as deals are updated on Expedia all the time.

Question 3

What airline has the least delays from IAD to Sea-Tac Airport?

Accepted Answer

Travel with United Airlines from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA) and you're more likely to hit the tarmac at the time that's on your plane ticket. This carrier is the top performer on this route, with 87% of on-time arrivals. If there is a delay to your flight, the free Expedia App is a great way to stay in the loop. Download it and receive immediate trip notifications, from flight delays to gate changes and more.

Question 4

What airports do you fly into for Seattle from Washington?

Accepted Answer

With Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI) to select from, making your way from Washington to Seattle is no sweat. The city's major gateway, Seattle - Tacoma Intl. Airport (SEA), is around 19 kilometers south of the downtown area. Besides ticket costs, consider things like transportation options from the airport and the distance to your hotel when deciding where to touch down. Get your Seattle trip off to a flying start by visiting Space Needle and Pike Place Market.

Question 5

What are the most popular departure times for flights from IAD to Sea-Tac Airport?

Accepted Answer

The most popular departure times for trips from Dulles Intl. Airport to SEA are between 5:00 PM - 6:00 PM on United Airlines. Our recommendation is to jet out in the morning. The earlier you leave, the better your odds of a delay-free flight with less air traffic in the skies.

Question 6

Can I change the date of my flight from Dulles Intl. Airport to SEA?

Accepted Answer

It's a breeze to make amendments to your IAD to SEA trip yourself. Access your itinerary via the Expedia Trips portal and tap "change flight." Look for new flights and secure the one that fits your plans. You'll see an estimate of flight change fees that may apply. You can also use our Customer Service portal to chat to our Virtual Agent and quickly get answers to all your questions.

Origin airport	Washington Dulles Intl.
Destination airport	Seattle - Tacoma Intl.
Airlines serving	Alaska Airlines, American Airlines, Delta, United
Roundtrip price	AED3,510
Distance	3679 km
Average flight time	2 hours 48 mins

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

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AED1,530 Cheap Flights from Washington (IAD) to Seattle (SEA)