Cheap Flight Tickets from Seattle (SEA) to Washington (IAD), Starting at $377

Good to Know: Cheapest and Fastest SEA - IAD Flights

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

Cheapest Round Trip Flight

$851

DL Delta Airlines • 1 stop • 13h 32m

Jul 03 – Jul 03

The cheapest round trip flight from Seattle to Washington (SEA-IAD-SEA) is currently $851

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Cheapest Direct Flight

$641

HA Hawaiian Airlines • nonstop • 7h 38m

Jul 02

The cheapest nonstop flight from Seattle to Washington (SEA-IAD) is currently $641

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Fastest Flight

7h 36m

The fastest nonstop flight from Seattle to Washington (SEA-IAD) takes 7h 36m

Top Airlines Flying from Seattle to Washington

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

Alaska Airlines -AS

Alaska Airlines

Sun Country Airlines (SY)

Sun Country Airlines

American Airlines, AA

American Airlines

Hawaiian Airlines-HA

Hawaiian Airlines

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

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

Jul 03 - Jul 03, Economy
DL
Seattle → Washington
13h 32m
5:30 AM - 4:42 PM • 1 stop
DL
Seattle → Washington
13h 24m
6:55 PM - 11:59 PM • 1 stop
$851
Delta Airlines
Jul 03 - Jul 03, Economy
UA
Seattle → Washington
8h 29m
8:15 AM - 4:24 PM • nonstop
DL
Seattle → Washington
13h 24m
6:55 PM - 11:59 PM • 1 stop
$1021
United Airlines
Jul 03 - Jul 03, Economy
UA
Seattle → Washington
12h 33m
5:00 AM - 3:53 PM • 1 stop
DL
Seattle → Washington
14h 19m
6:00 PM - 11:59 PM • 1 stop
$1031
United Airlines
Jul 03 - Jul 03, Economy
UA
Seattle → Washington
15h 58m
5:00 AM - 5:58 PM • 1 stop
UA
Seattle → Washington
27h 17m
10:29 PM - 12:06 PM • 1 stop
$1083
United Airlines
Jul 03 - Jul 03, Economy
UA
Seattle → Washington
12h 6m
8:56 AM - 7:22 PM • 1 stop
UA
Seattle → Washington
28h 53m
10:20 PM - 12:53 PM • 1 stop
$1127
United Airlines
Jul 03 - Jul 03, Economy
AS
Seattle → Washington
7h 38m
9:13 AM - 5:11 PM • nonstop
AS
Seattle → Washington
28h 57m
7:49 PM - 10:26 AM • 1 stop
$1177
Alaska Airlines

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

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

FAQs on Seattle to Washington Flights

What are the airports in Seattle?
SEA
What’s the most popular airline flying from SEA to IAD?
The most popular airline flying from Seattle to Washington are
Can I fly from SEA to IAD non-stop?
Yes, you can fly SEA to IAD non-stop on
Which airlines fly nonstop between Seattle and Washington?
The non-stop flights between Seattle and Washington are .
What’s the earliest departure time from SEA to IAD Airport?
The earliest flight leaves SEA at 5:00 am and lands in IAD - Washington Dulles International
What are the airports in Washington?
IAD,BWI,DCA
Can I make changes to my Seattle to Washington 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 SEA to IAD?
Read the fare rules of the Seattle to Washington 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 Seattle and Washington?
operate flights between Seattle and Washington
How long does a flight from Seattle to Washington take?
It takes approximately 5 hour to fly non-stop from SEA to IAD, which is 2305.73 miles by air.
Which airlines provide the cheapest flights from Seattle (SEA) to Washington (IAD) ?
In the past couple of days, the cheapest tickets to IAD from SEA were found on AS : USD 1177
Do I need a passport to fly between SEA and IAD?
No
What’s the latest departure time from SEA to IAD ?
The last flight leaves SEA at 11:20 pm

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

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

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