Cheap Flight Tickets from Seattle (SEA) to Washington (IAD), Starting at $187

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

$187

AS Alaska Airlines • nonstop • 8h 26m

Sep 01 – Sep 06

The cheapest round trip flight from Seattle to Washington (SEA-IAD-SEA) is currently $187

🔍 Search Flights

Cheapest Direct Flight

$187

AS Alaska Airlines • nonstop • 8h 26m

Sep 01

The cheapest nonstop flight from Seattle to Washington (SEA-IAD) is currently $187

🔍 Search Flights

Fastest Flight

7h 38m

The fastest nonstop flight from Seattle to Washington (SEA-IAD) takes 7h 38m

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.

Sep 01 - Sep 06, Economy
AS
Seattle → Washington
8h 26m
8:38 AM - 4:44 PM • nonstop
AS
Seattle → Washington
9h 7m
5:47 PM - 8:34 PM • nonstop
$187
Alaska Airlines
Sep 01 - Sep 06, Economy
AS
Seattle → Washington
30h 25m
8:49 PM - 6:14 PM • 1 stop
AS
Seattle → Washington
8h 57m
7:00 AM - 9:37 AM • nonstop
$234
Alaska Airlines
Sep 01 - Sep 06, Economy
DL
Seattle → Washington
13h 24m
1:30 PM - 12:34 AM • 1 stop
DL
Seattle → Washington
9h 5m
7:10 AM - 9:55 AM • nonstop
$264
Delta Airlines
Sep 01 - Sep 06, Economy
AA
Seattle → Washington
8h 25m
9:35 PM - 5:40 AM • nonstop
AA
Seattle → Washington
16h 47m
6:09 AM - 1:16 PM • 1 stop
$267
American Airlines
Sep 01 - Sep 06, Economy
UA
Seattle → Washington
12h 15m
12:44 PM - 11:19 PM • 1 stop
UA
Seattle → Washington
9h 6m
1:20 PM - 4:06 PM • nonstop
$267
United Airlines
Sep 01 - Sep 06, Economy
UA
Seattle → Washington
12h 23m
8:40 AM - 7:23 PM • 1 stop
UA
Seattle → Washington
9h 6m
1:20 PM - 4:06 PM • nonstop
$267
United 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 8:10 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 DL : USD 264
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

Essential Information for Booking Flights from Seattle (SEA) - AI Insights

What's the cheapest airline from sea to iad?
You can find affordable flights from Seattle to Washington Dulles International Airport on Alaska Airlines. For a round-trip economy ticket, book at least 19 days in advance to secure low fares. This will help you save money on airfares and enjoy your trip with budget-friendly flights.
What's the popular airline to fly from sea to iad?
You can fly from Seattle Tacoma International Airport (SEA) to Washington Dulles International Airport (IAD) on United Airlines. As a round-trip passenger, you can enjoy low fares on this route. To book your flight, consider advance booking days of 19 or more for the best savings.
What's the cheapest day of the week to fly from sea to iad?
The cheapest day to fly from Seattle (SEA) to Washington Dulles International Airport (IAD) is Sunday. Flying on Sundays can result in lower airfares, making it a budget-friendly option for your round-trip journey.
What's the cheapest month to fly from sea to iad?
The cheapest month to fly from Seattle (SEA) to Washington Dulles International Airport (IAD) is November. Flying during this time can help you save on airfares, making it a budget-friendly option for your round-trip journey. You can find affordable flights with airlines offering low fares and airfare deals.
Which airline/airlines fly from sea to iad?
The airlines that fly from Seattle Tacoma International to Washington Dulles International include United Airlines, Hawaiian Airlines, Aeromexico, Southwest Airlines, Sun Country Airlines, JetBlue Airways, Qatar Airways, and WestJet Airlines.
What is the cheapest airfare from Seattle to Washington Dulles?
The cheapest airfare from Seattle to Washington Dulles can be found on Alaska Airlines (AS) with a cost of £125 for a round trip economy ticket.
How far in advance should I book my round trip flights for the best price?
To secure the best price, it is recommended to book your round trip flights at least 19 days in advance.
Can I find last-minute flights on your website?
Yes, you can find last-minute flights on our website, but availability may be limited.
Is it possible to book busco flights with awesome airlines?
Unfortunately, we do not have any airline options that match the term 'busco'.
How can I use your website to plan my weekend viajar trips?
You can use our website to compare airfares and find the best deals for your weekend viajar trips.
What is the average cost of airfare from Milwaukee to Washington Dulles?
The average cost of airfare from Milwaukee to Washington Dulles varies depending on the airline and time of year.
Are there any options for booking cheapflights with ultima features?
Yes, we offer a range of cheapflights options with ultima features, including budget-friendly airlines like Southwest Airlines (WN) and Sun Country Airlines (SY).

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

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

More Flight Options for Seattle (SEA) and Washington (IAD)

Why Fareleaders for SEA to IAD Plane Tickets

Lowest Prices
Lowest Prices
Uncover the best deals on Seattle to Washington flights by comparing fares from hundreds of airlines and agencies.
New Deals
New Deals Everyday
Get the best prices on SEA to IAD flights—we update our fares daily so you never miss a saving.
Best Travel Options
No Service Fees
Compare hundreds of Seattle to Washington flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the Seattle (SEA) to Washington (IAD)
Terms and Conditions*