IAD to SEA (Washington to Seattle) Flights

Last Minute Flights from IAD to SEA

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
IADSeattleAugust 2 to August 12$578
*Prices include taxes and fees

Cheapest IAD to SEA Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
IADSeattleSeptember 24 to September 24$241
IADSeattleSeptember 28 to October 8$254
IADSeattleSeptember 17 to September 24$257
IADEverettAugust 26 to September 7$412
*Prices include taxes and fees
IAD to SEA Flight Details
Origin airport
Washington Dulles Intl.
Origin airport IATA code
IAD
Destination airport
Seattle - Tacoma Intl.
Destination airport IATA code
SEA
Distance
2299 mi

Frequently asked questions

What airlines fly direct from IAD to Seattle - Tacoma Intl. Airport (SEA)?
Jet off on a nonstop flight from IAD to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines (AS). It offers 78 of these convenient and popular services each month. You can also zip off to Seattle - Tacoma Intl. Airport (SEA) with Delta Air Lines (DL). With 56 nonstop monthly services to pick from, you can start your vacation faster.
How many flights are there from IAD to SEA?
There are roughly 6 flights a day from Washington, DC (IAD-Washington Dulles Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), so you have plenty of ways to get to SeaTac. Just pick out a date and time that works best for you and lock in your fare.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
On average, it takes 5 hours and 48 minutes to journey from Washington, DC (IAD-Washington Dulles Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). That’s ample time to begin your travel diary, do a bit of eleventh-hour trip planning or read up about the fantastic adventures that await you in SeaTac.
What is the flight distance from Washington, DC (IAD-Washington Dulles Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
At 2,300 miles (3,700 1), this medium-haul flight is no relentless marathon, but it’s also no walk in the park. Land in SeaTac feeling recharged by having a snooze en route.
How many morning flights are there from IAD to SEA?
There are 19 flights in the morning from IAD to SEA every week. Popular carrier Alaska Airlines (AS) lists an average of 7 weekly services that depart before midday. The earliest leaves at 7:40AM.
How many afternoon flights are there from IAD to SEA?
There are 25 afternoon and evening flights from IAD to SEA each week. Alaska Airlines (AS) offers 11 weekly flights after midday. With the earliest one leaving the runway at 4:40PM, you’ll have time to indulge in a little pre-flight retail therapy!
What is the earliest departure time out of Chantilly to SeaTac?
The earliest flight flies from IAD at 7:30AM and lands at SEA at 1:20PM. Be sure to allow yourself ample time in the morning to make it to the airport.
What is the latest departure time out of Chantilly to SeaTac?
The latest flight takes off from IAD at 7:09PM and comes in at 1:00AM at SEA. You’ll have plenty of time to prepare for this flight.
What is the average price from Chantilly to SeaTac?
Round-trip tickets from IAD to SEA begin from around $241. Book your adventure today and score a great deal. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Washington to Seattle Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Washington to Seattle to attend your cousin’s wedding, to pitch a business idea to your boss, or simply treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find our cheapest flights from IAD to SEA, we’ve got you covered here at Flights.com.

We present you with some of the most affordable deals on airfare, so stop that Google flights search. We want you to spend less on your flight from Washington to Seattle, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.