Cheap Flight Tickets from Washington (IAD) to Seattle (SEA), Starting at $292

Good to Know: Cheapest and Fastest IAD - SEA Flights

Useful information for finding best airline tickets from Washington Dulles International to Seattle Tacoma International on your next trip.

Cheapest Round Trip Flight

$311

AS Alaska Airlines • nonstop • 8h 56m

Sep 20 – Sep 24

The cheapest round trip flight from Washington to Seattle (IAD-SEA-IAD) is currently $311

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Cheapest One way Flight

$292

AS Alaska Airlines • 1 stop • 4h 13m

Sep 25

The cheapest one way flight from Washington to Seattle (IAD-SEA) is currently $292

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Cheapest Direct Flight

$311

AS Alaska Airlines • nonstop • 8h 56m

Sep 20

The cheapest nonstop flight from Washington to Seattle (IAD-SEA) is currently $311

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Fastest Flight

4h 13m

The fastest nonstop flight from Washington to Seattle (IAD-SEA) takes 4h 13m

Top Airlines Flying from Washington to Seattle

Delta Airline, DL

Delta Airlines

Alaska Airlines -AS

Alaska Airlines

United Airlines, UA

United Airlines

American Airlines, AA

American Airlines

Latest Flight Deals from Washington (IAD) to Seattle (SEA)

Compare and book low fare round-trip air tickets from Washington to Seattle. Ideal for travelers with confirmed return itineraries.

Sep 20 - Sep 24, Economy
AS
Washington → Seattle
8h 56m
9:03 AM - 11:39 AM • nonstop
AS
Washington → Seattle
8h 27m
10:23 PM - 6:30 AM • nonstop
$311
Alaska Airlines
Sep 20 - Sep 24, Economy
AS
Washington → Seattle
9h 7m
5:57 PM - 8:44 PM • nonstop
AS
Washington → Seattle
8h 27m
10:23 PM - 6:30 AM • nonstop
$311
Alaska Airlines
Sep 20 - Sep 24, Economy
AS
Washington → Seattle
8h 57m
7:00 AM - 9:37 AM • nonstop
AS
Washington → Seattle
8h 27m
10:23 PM - 6:30 AM • nonstop
$311
Alaska Airlines
Sep 20 - Sep 24, Economy
AS
Washington → Seattle
9h 7m
5:57 PM - 8:44 PM • nonstop
AS
Washington → Seattle
14h 6m
6:00 AM - 5:46 PM • 1 stop
$341
Alaska Airlines
Sep 20 - Sep 24, Economy
AS
Washington → Seattle
8h 56m
9:03 AM - 11:39 AM • nonstop
AS
Washington → Seattle
36h 51m
7:49 PM - 9:00 PM • 2 stops
$383
Alaska Airlines
Sep 20 - Sep 24, Economy
DL
Washington → Seattle
9h
7:25 AM - 10:05 AM • nonstop
DL
Washington → Seattle
8h 24m
2:52 PM - 10:56 PM • nonstop
$412
Delta Airlines

Fly from Washington to Seattle with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Washington to Seattle? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Washington to Seattle Flights

What are the airports in Washington?
IAD,BWI,DCA
What’s the most popular airline flying from IAD to SEA?
The most popular airline flying from Washington to Seattle are
Can I fly from IAD to SEA non-stop?
Yes, you can fly IAD to SEA non-stop on
Which airlines fly nonstop between Washington and Seattle?
The non-stop flights between Washington and Seattle are .
What’s the earliest departure time from IAD to SEA Airport?
The earliest flight leaves IAD at 7:00 am and lands in SEA - Seattle Tacoma International
What are the airports in Seattle?
SEA
Can I make changes to my Washington to Seattle flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from IAD to SEA?
Read the fare rules of the Washington to Seattle air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Washington and Seattle?
operate flights between Washington and Seattle
How long does a flight from Washington to Seattle take?
It takes approximately 5 hour to fly non-stop from IAD to SEA, which is 2305.73 miles by air.
Which airlines provide the cheapest flights from Washington (IAD) to Seattle (SEA) ?
In the past couple of days, the cheapest tickets to SEA from IAD were found on DL : USD 932
Do I need a passport to fly between IAD and SEA?
No
What’s the latest departure time from IAD to SEA ?
The last flight leaves IAD at 7:47 pm

Washington (IAD) to Seattle (SEA): Airport Information

Origin Airport Washington Dulles International , Washington, US
Destination Airport Seattle Tacoma International , Seattle, US
Distance 2306 miles

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