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Amazing IAD to SEA Flight Deals

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $232 round trip and $129 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for IAD to SEA

Carrier Flight Depart IAD Arrive SEA Tue
10/27
Wed
10/28
Thu
10/29
Fri
10/30
Sat
10/31
Sun
11/1
Mon
11/2
Stops
AS 1032 10:40 am 01:20 pm Check fare Check fare Check fare Check fare Check fare Check fare - 0 stop(s)
UA 326 05:55 pm 08:35 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
AS 1085 05:10 pm 08:09 pm - - - - - Check fare Check fare 0 stop(s)

Seattle - Tacoma Intl. flight + hotel packages - economy flights

FAQs about flights from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA)

Are there direct flights from Washington, DC (IAD-Washington Dulles Intl.) to Sea-Tac Airport?

Multiple airlines offer passengers nonstop flights from Washington, DC (IAD-Washington Dulles Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Among these are Alaska Airlines and United Airlines — start with them if you want to touch down at your destination with no changeover.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to Seattle, WA (SEA-Seattle - Tacoma Intl.), please visit our Customer Service Portal.

How long is the flight from Washington, DC (IAD-Washington Dulles Intl.) to Sea-Tac Airport?

It takes approximately 6 hours and 16 minutes to fly from Washington, DC (IAD-Washington Dulles Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). You'll be in your seat for a while, so entertain yourself with a television show or flick through the airway's magazines.

What is the flight distance from Washington, DC (IAD-Washington Dulles Intl.) to Sea-Tac Airport?

Between Washington, DC (IAD-Washington Dulles Intl.) and Seattle, WA (SEA-Seattle - Tacoma Intl.), the flight distance is approximately 2,361 mi. So, order a glass of Champagne and get comfortable. You've got some important decisions to make — watch a movie, read your novel or squeeze in some beauty sleep?

What airlines fly from Washington, DC (IAD-Washington Dulles Intl.) to Sea-Tac Airport?

If you're heading to Seattle from Washington, there are a few airlines offering direct flights. One of the most well-known is Alaska Airlines (AS), which operates 60 flights each month. If you want more choice, have a look at United Airlines (UA). This airline has 97 flights each month. Between the two, there's no doubt you'll find the flight to suit your travel plans.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2019, flights departing on a Tuesday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.

Washington Dulles Intl. to Seattle - Tacoma Intl. Flight FAQ

Traveling FromWashington Dulles Intl.
Traveling ToSeattle - Tacoma Intl.
Shortest Flight Time5 hours 53 mins
Earliest Departure Time5:10PM EST
Latest Departure Time5:55PM EST
Lowest Flight Price$232

Washington to Seattle Carriers and Route Information

Flight path for flights from Washington Dulles International Airport to Seattle-Tacoma International Airport


Distance:
2,313.00 miles


Airlines & Aircraft Used on IAD to SEA Flight Routes


Airline Carrier
Aircraft
Alaska Airlines
Canadair Regional Jet 700
Alaska Airlines
Embraer RJ140
Alaska Airlines
Embraer RJ145 Amazon
United Airlines
Boeing 737-800 pax
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.