SEA to IAD (Seattle to Washington) Flights

Last Minute Flights from SEA to IAD

Best airfare and ticket deals for SEA to IAD flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
SEAChantillyApril 26 to April 29$439
*Prices include taxes and fees

Cheapest SEA to IAD Flights

Best airfare and ticket deals for SEA to IAD flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
SEAChantillyMay 1 to May 30$265
SEAChantillyMay 1 to May 31$267
SEAChantillyMay 28 to May 29$270
PAEChantillyMay 30 to June 4$392
*Prices include taxes and fees
SEA to IAD Flight Details
Origin airport
Seattle - Tacoma Intl.
Origin airport IATA code
SEA
Destination airport
Washington Dulles Intl.
Destination airport IATA code
IAD
Distance
2299 mi

Frequently asked questions

Which airlines with flights from Seattle - Tacoma International Airport to IAD allow free cancellation due to COVID-19?
Quite a few airlines are now offering airfares with flexibility so you can book your flight to Washington Dulles International Airport with confidence. To locate which carriers have these kinds of tickets, use our helpful filter tool. Simply click the “No change fee” check box directly under the “Flexible change policies” section. Also read through the airline’s terms and conditions so you understand what COVID-19 related changes are permitted.
What airlines fly direct from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to IAD?
Check out Alaska Airlines (AS). It provides 52 flights every month that jet straight from Sea-Tac Airport to Washington, DC Airport (IAD-Washington Dulles Intl.). With 30 nonstop monthly services of its own on this air route, United Airlines (UA) is another top pick.
How many flights are there from SEA to IAD?
About 3 per day. If you’re in a big rush to fly to Loudoun County, see if you can grab an epic last-minute deal from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.) and then book it pronto!
How long does it take to fly from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.)?
Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.) takes about 5 hours and 3 minutes. That’s an ideal amount of time to binge-watch a gripping TV series, listen to a podcast or catch some z’s.
What is the flight distance from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.)?
At a distance of 2300 miles (3700 km), you’ll be in the sky for some time during this medium-haul flight. Need more legroom? Ask for an aisle seat. Otherwise, sidle up to a window and enjoy the changing scenery between Seattle and Loudoun County.
How many morning flights are there from SEA to IAD?
Set off from SEA to IAD on one of the 20 morning flights available each week. Delta (DL) operates 7 of these services, with the earliest departure at 5:10PM.
How many afternoon flights are there from SEA to IAD?
You can select from 6 afternoon and evening flights scheduled per week from SEA to IAD. If you want to jet away with Alaska Airlines (AS), it operates 5 weekly departures from midday. The first takes to the skies at 10:47PM, which means you can sleep in a little longer.
What is the earliest departure time out of Seattle to Loudoun County?
Set off from SEA at 8:06AM and touch down at IAD at 1:17PM. This flight is the earliest you can take on this route.
What is the latest departure time out of Seattle to Loudoun County?
The latest flight leaves SEA at 11:55PM and lands at IAD at 4:46AM. You’ll have more than enough time to get ready for this flight.
What is the average price from Seattle to Loudoun County?
Flights from SEA to IAD can be found for around $265. You’ll want to get a move on, because awesome fares don’t hang around forever! This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Seattle to Washington Flight Schedule

CarrierFlightDepart SEAArrive IADSat
4/20		Sun
4/21		Mon
4/22		Tue
4/23		Wed
4/24		Thu
4/25		Fri
4/26		Stops
UA136008:06 am04:10 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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DL95208:55 am04:50 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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AS40610:00 am06:04 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA65610:49 am09:01 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
1 Stops
AS34804:03 pm11:59 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA183504:47 pm06:33 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
1 Stops
AS33807:35 am03:40 pm
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0 Stops
UA41807:10 pm05:21 am
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1 Stops
DL71910:30 pm06:25 am
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0 Stops

Seattle to Washington Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Seattle to Washington to attend your cousin’s wedding, to pitch a business idea to your boss, or perhaps simply to treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find the cheapest flights from SEA to IAD, we’ve got you covered here at Flights.com.

We present you with some of the hottest deals on airfare so stop that Google flights search. We want you to spend less on your flight from Seattle to Washington, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.