Cheap Flights from Washington, D.C. to Seattle

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Find the cheapest month to fly from Washington, D.C. to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington, D.C. to Seattle flights are currently cheapest in May.

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Direct flights from Washington, D.C. to Seattle

Alternative Washington, D.C. to Seattle routes

Looking for the cheapest, fastest or easiest route from Washington, D.C. to Seattle? You could fly into the following airports instead.

Washington, D.C. to Seattle: Flight information

The things to know before you go.

Cheapest flight found	AED 262
Cheapest month to fly	May
Average flight time	5 hrs, 53 mins
Most popular airline	Alaska Airlines
Average flights per week	269

Finding cheap flights from Washington, D.C. to Seattle: Frequently asked questions

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are round-trip flights from Washington, D.C. to Seattle?

The best price we found for a round-trip flight from Washington, D.C. to Seattle is AED 524. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Washington, D.C. to Seattle?

5 hours and 53 minutes is the average flight time from Washington, D.C. to Seattle.

Which airlines fly direct from Washington, D.C. to Seattle?

Alaska Airlines, United and Qatar Airways fly direct from Washington, D.C. to Seattle.

How many flights are there a week from Washington, D.C. to Seattle?

There are 1,076 flights per week flying from Washington, D.C. to Seattle, as of March 2026.

When is the cheapest time to fly from Washington, D.C. to Seattle?

The cheapest month to fly from Washington, D.C. to Seattle is usually April.

What's the cheapest airport to fly to in Seattle?

If you're flying from Washington, D.C., the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the center of Seattle. We've found flights to this airport from AED 524.

Which upcoming date is cheapest to fly from Washington, D.C. to Seattle on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington, D.C. to Seattle on Wednesday, April 22, 2026.

Can I get a direct flight from Washington, D.C. to Seattle?

Yes – the average flight time is 5 hours and 53 minutes.

How can I get the best flight deal from Washington, D.C. to Seattle?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Seattle?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Seattle?

In March, the average temperature is usually around 6°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.

Which is the cheapest airline to fly with from Washington, D.C. to Seattle?

The cheapest airline that flies to Seattle is Alaska Airlines.

Traveling from Washington DC to Seattle: what you need to know

Your next exciting journey begins at one of Washington DC's main airports, Ronald Reagan National Airport (DCA) or Washington Dulles International Airport (IAD). Explore your options for booking a flight from Washington DC to Seattle departing from either of these.
When it comes to where you'll land, Seattle's major arrival point is Seattle-Tacoma International Airport (SEA).
Around 5 hours 50 minutes is how long you'll be in transit on a direct Washington DC to Seattle flight.
Seattle is three hours behind Washington DC and observes the UTC-7 timezone.
The most popular route for flights from Washington DC to Seattle is from Ronald Reagan National Airport (DCA) to Seattle-Tacoma International Airport (SEA). Choose from 20 services every week between these two airports. If you want to be on your way as soon as possible, the earliest flight from DCA to SEA is the 08:00 Alaska Airlines option. If you have other commitments or plans on your day of travel, the last available departure is at 17:55 with Alaska Airlines.
For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This leaves you with plenty of time to board your Washington DC to Seattle flight.
You can expect longer lines in popular months like July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure will help ensure a smooth travel experience.

How to find the cheapest flights from Washington DC to Seattle

AED 262 is currently the best price for a one-way ticket from Washington DC to Seattle. A return flight starts at AED 524. These fares may change depending on demand.
Book five months before flying. Pricing trends show that this is the ideal window for finding cheap Washington DC to Seattle flights.
August is the best month for picking up an incredible deal on a plane ticket from Washington DC to Seattle. If you're looking to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.
Getting a cheap flight from Washington DC to Seattle is a piece of cake with Price Alerts. Simply set up one of these automatic alerts and we'll notify you when a better deal is available.
Save money on your Washington DC to Seattle flight with the help of our filters. Select your preferred times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

Flying from Washington DC

Ronald Reagan National Airport (DCA)

If you're after a direct flight from Washington DC to Seattle, you can depart from Ronald Reagan National Airport (DCA). Fly from DCA to Seattle-Tacoma International Airport (SEA) in one seamless trip.
Alaska Airlines is a popular carrier that offers direct Washington DC to Seattle plane tickets from DCA.
Traveling from central Washington DC to DCA takes around 45 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 6 kilometers in 15 minutes or so, depending on traffic.
Want a stress-free start to your break? Stay near Ronald Reagan National Airport. Whether you've booked an early flight from Washington DC to Seattle or just don't want to be rushed, these hotels have you covered:
76.44% of flights departing from Ronald Reagan National Airport reach their destination on schedule.
DCA is located at 1 Aviation Circle.

Washington Dulles International Airport (IAD)

You can take a direct flight from Washington DC to Seattle departing from Washington Dulles International Airport (IAD). Start your journey at IAD and step off the plane at Seattle-Tacoma International Airport (SEA).
IAD has a range of airlines that offer direct Washington DC to Seattle plane tickets. Hop on board with any of these carriers:
You can reach IAD from central Washington DC in about 50 minutes by car (depending on traffic). The journey by public transport takes roughly 1 hour 10 minutes to travel the 40 kilometers or so.
Want to enjoy an extra night away before boarding your flight from Washington DC to Seattle? Check in to a hotel near Washington Dulles International Airport before your trip officially starts. These stays are calling your name:
Looking at how often flights stay on schedule, Washington Dulles International Airport has an on-time arrival performance of 74%.
You'll find IAD at 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

Baltimore/Wash International Thurgood Marshall Airport (BWI) has convenient direct flights from Washington DC to Seattle. Your trip from BWI will have you disembarking at Seattle-Tacoma International Airport (SEA).
Get set for takeoff with Alaska Airlines. It offers direct Washington DC to Seattle plane tickets from BWI.
From the center of Washington DC, BWI is around 40 kilometers away. It takes roughly 50 minutes to reach the airport by car and 1 hour 30 minutes or so if you use public transport.
Take the uncertainty out of departure day — stay near Baltimore/Wash International Thurgood Marshall Airport and know you'll get to your gate with time to spare. Settle in at one of these hotels the day before if you have an early Washington DC to Seattle flight:
Airports have an on-time performance rating that tracks how often flights get to their destinations without delays. At BWI, that rate is 77.13%.

Arriving in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) to central Seattle takes around 20 minutes to reach by car. The center is roughly 19 kilometers away.
Getting to the center on public transport will take you around 55 minutes.
If you're arriving on a late flight from Washington DC to Seattle, few things beat the convenience of staying close to the terminal. Grab your luggage from the carousel and then be showered and relaxing soon after at one of these hotels near SEA:
Go wherever you want, whenever you want with a Seattle-Tacoma International Airport rental car. Pick up your wheels from Thrifty, Europcar or Budget and experience more of Seattle and beyond.
Lock in the best deal by booking your vehicle from Seattle-Tacoma International Airport about one week before your departure date.

Lake Union Sea Plane Base Airport (LKE)

Central Seattle is about 3 kilometers from Lake Union Sea Plane Base Airport (LKE). After your flight from Washington DC to Seattle has hit the runway and you've navigated your way to arrivals, the drive should take about 10 minutes.
If you choose to travel on public transport, you'll get to the city center in 25 minutes or so.
After your flight from Washington DC to Seattle, unwind at a hotel near LKE. These are some comfortable options that'll help you sink into relaxation mode:

Best time to go to Seattle

May is the quietest month for flights from Washington DC to Seattle, while July is the busiest. Find the best time to go to Seattle based on whether you want a bustling atmosphere or a more laid-back vibe.
The warmest month in Seattle is August, with temperatures ranging between 12ºC (54ºF) and 28ºC (82ºF). Book your Washington DC to Seattle ticket then if that's your definition of good weather.
February sees average temperatures of between -1ºC (30ºF) and 11ºC (52ºF). Search for cheap flights from Washington DC to Seattle around that time if you like traveling in cooler conditions.

More about Seattle

Start your Seattle trip right by choosing the ideal place to stay. After booking your flight from Washington DC to Seattle, explore our range of hotels including:
There are so many things to discover in this city it can be hard to figure out where to begin. Greyhound: Bus Station, LMN Architects and Boeing Radiation Effects Lab are major attractions which should be on any well-planned Seattle itinerary.

Explore more of United States

Portland is just one of the many places in United States waiting to be explored once you've seen Seattle. Around 241 kilometers to the south, popular attractions include Pioneer Courthouse Square, Portland Japanese Garden and Pittock Mansion.
Around 370 kilometers east of Seattle, Spokane is another essential stop in United States. Get a taste of what this destination has to offer at Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.