Cheap Flight Tickets from Washington (IAD) to Seattle (SEA), Starting at $190

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

$198

AS Alaska Airlines • nonstop • 9h 5m

Oct 08 – Oct 10

The cheapest round trip flight from Washington to Seattle (IAD-SEA-IAD) is currently $198

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Cheapest Direct Flight

$190

AS Alaska Airlines • nonstop • 4h 11m

Oct 08

The cheapest nonstop flight from Washington to Seattle (IAD-SEA) is currently $190

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Fastest Flight

4h 6m

The fastest nonstop flight from Washington to Seattle (IAD-SEA) takes 4h 6m

Top Airlines Flying from Washington to Seattle

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

American Airlines, AA

American Airlines

Alaska Airlines -AS

Alaska 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.

Oct 08 - Oct 10, Economy
AS
Washington → Seattle
9h 5m
6:15 PM - 9:00 PM • nonstop
AS
Washington → Seattle
8h 23m
3:56 PM - 11:59 PM • nonstop
$198
Alaska Airlines
Oct 09 - Oct 11, Economy
AA
Washington → Seattle
20h 47m
1:23 PM - 11:10 PM • 1 stop
AA
Washington → Seattle
11h 53m
11:03 AM - 9:16 PM • 1 stop
$371
American Airlines
Oct 08 - Oct 10, Economy
DL
Washington → Seattle
16h 44m
3:03 PM - 11:52 PM • 1 stop
DL
Washington → Seattle
8h 28m
11:58 AM - 8:06 PM • nonstop
$421
Delta Airlines
Oct 08 - Oct 10, Economy
UA
Washington → Seattle
15h 31m
12:58 PM - 7:29 PM • 1 stop
UA
Washington → Seattle
8h 23m
11:14 PM - 7:17 AM • nonstop
$718
United Airlines
Oct 08 - Oct 10, Economy
AA
Washington → Seattle
- • nonstop
AA
Washington → Seattle
- • 1 stop
$1053
American Airlines
Oct 09 - Oct 11, Economy
AS
Washington → Seattle
40h 25m
7:24 PM - 4:49 PM • 2 stops
AS
Washington → Seattle
8h 23m
3:56 PM - 11:59 PM • nonstop
$1719
Alaska 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 7:02 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 AA : USD 371
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 9:800 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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