Cheap Flights from Washington D.C. to Seattle / Tacoma International

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Flight deals from Washington D.C. to Seattle / Tacoma International

Looking for a cheap last-minute deal or the best return flight from Washington D.C. to Seattle / Tacoma International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Washington D.C. to Seattle / Tacoma International

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 / Tacoma International flights are currently cheapest in May.

Direct flights from Washington D.C. to Seattle / Tacoma International

Washington D.C. to Seattle / Tacoma International: Alternative routes

Compare routes from Washington D.C. to Seattle below. You may find an airport to fly into that's cheaper, faster, or easier than Seattle / Tacoma International.

Washington D.C. to Seattle: Flight information

The things to know before you go.
Cheapest flight foundRs21,968
Cheapest month to flyMay
Average flight time5 hrs, 54 mins
Most popular airlineAlaska Airlines
Average flights per week237

Finding cheap flights from Washington D.C. to Seattle / Tacoma International: Frequently asked questions

The best price we found for a return flight from Washington D.C. to Seattle / Tacoma International is Rs41,287. 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.
5 hours and 54 minutes is the average flight time from Washington D.C. to Seattle / Tacoma International.
Alaska Airlines, United and American Airlines fly direct from Washington D.C. to Seattle / Tacoma International.
As of March 2026, there are 237 flights per week flying from Washington D.C. to Seattle / Tacoma International.
The cheapest month to fly from Washington D.C. to Seattle / Tacoma International is usually March.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Seattle / Tacoma International Airport on Saturday, 21 March 2026.
Yes – the average flight time is 5 hours and 54 minutes.
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 / Tacoma International 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.
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.
The cheapest airline that flies to Seattle / Tacoma International is Hawaiian Airlines .

Travelling from Washington DC to Seattle-Tacoma International Airport (SEA): What you need to know

  • Begin your trip planning by looking up the most convenient place to catch your flight from Washington DC to Seattle-Tacoma International Airport (SEA). Explore the options for taking off from Ronald Reagan National Airport (DCA) or Washington Dulles International Airport (IAD), two of the city's main airports.

  • Hop on a direct Washington DC to Seattle-Tacoma International Airport flight and you'll be travelling for an average of 5 hours 55 minutes.

  • Seattle-Tacoma International Airport is located in Seattle. The city is in the UTC-7 timezone and is three hours behind Washington DC.

  • Ronald Reagan National Airport (DCA) to Seattle-Tacoma International Airport (SEA) is the most popular route. There are 20 direct flights a week to pick from. If you have plans before you fly, take the last flight with Alaska Airlines at 5:55pm. Opt for the first DCA to SEA departure operated by Alaska Airlines at 8am if you want to get going earlier.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This ensures you have enough time to board your flight from Washington DC to SEA.

  • During peak travel periods, allow for extended wait times and get there earlier. Aim for at least two hours ahead for domestic flights and as much as four hours for international journeys.

Airports in Washington DC

Ronald Reagan National Airport (DCA)

  • You can hop on a direct flight from Washington DC to Seattle-Tacoma International Airport (SEA) departing from Ronald Reagan National Airport (DCA).

  • Alaska Airlines is a popular airline that offers direct flights from Washington DC to Seattle-Tacoma International Airport jetting out of DCA.

  • Alaska Airlines is the airline most travellers choose for flights from DCA to SEA.

  • The carrier with the best punctuality score on this route is Alaska Airlines. Its services arrive without delay 77.5% of the time.

  • DCA is about 8 kilometres from central Washington DC. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 15 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the trip time to be around 45 minutes.

  • Catching an early flight from Washington DC to Seattle-Tacoma International Airport? Avoid the stress of rushing to the terminal (and sneak in some extra precious sleep) by staying at one of these hotels close to Ronald Reagan National Airport:

  • Of all flights leaving Ronald Reagan National Airport, 76.44% touch down on time at their destination.

  • DCA's address is 1 Aviation Circle.

Washington Dulles International Airport (IAD)

  • Consider starting your trip from Washington Dulles International Airport (IAD). You can book a direct Washington DC to Seattle-Tacoma International Airport (SEA) flight ticket from this popular hub.

  • You can pick from a range of airlines offering direct flights from Washington DC to SEA departing from IAD. Jet off with any of these carriers and skip the layovers:

  • On the IAD to SEA route, Alaska Airlines is the preferred choice for many passengers.

  • Fly with Delta Air Lines if punctual service is a priority. Its flights between Washington Dulles International Airport and Seattle-Tacoma International Airport arrive as scheduled 85.53% of the time.

  • IAD is around 56 kilometres from central Washington DC. It takes 50 minutes or so to get to the airport by car from the city centre. Public transport takes approximately 1 hour 10 minutes.

  • Want to treat yourself to an extra night away before catching your Washington DC to SEA flight? Unwind in a hotel near Washington Dulles International Airport before your trip officially begins. These stays have your key waiting:

  • 74.39% of flights out of Washington Dulles International Airport arrive according to schedule.

  • You'll find IAD at 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Begin your trip at Baltimore/Wash International Thurgood Marshall Airport (BWI) and go straight to your destination without any layovers. You can book direct flights from Washington DC to Seattle-Tacoma International Airport from here.

  • Take off from BWI with Alaska Airlines. This popular carrier offers direct Washington DC to SEA flight tickets.

  • The airline most travellers choose when flying between BWI and SEA is Alaska Airlines.

  • The carrier with the best on-time performance on this route is Alaska Airlines. Its services land as planned 72.92% of the time.

  • The trip to BWI from the centre of Washington DC is around 1 hour 30 minutes by public transport. If you're planning to travel by car, it'll take you about 50 minutes to cover the 48 kilometres or so.

  • Make departure day worry-free — stay near Baltimore/Wash International Thurgood Marshall Airport and know you'll be at the terminal with time to spare. Get settled at one of these hotels the day before if you're catching an early Washington DC to Seattle-Tacoma International Airport flight:

  • The on-time performance rating of BWI is 77.13%. In other words, that's how frequently flights departing this airport arrive at their destination as planned.

About Seattle-Tacoma International Airport (SEA)

Getting from Seattle-Tacoma International Airport (SEA) to central Seattle

  • The centre of Seattle is around 18 kilometres from Seattle-Tacoma International Airport. Journey times by cab or car hire will vary based on time of day, so do some research before your trip.

  • If you're travelling by public transport, expect a journey of about 55 minutes.

How to find the cheapest flights from Washington DC to Seattle-Tacoma International Airport (SEA)

  • The cheapest price we've found for a one-way ticket from Washington DC to Seattle-Tacoma International Airport is Rs21,968. For a return flight on this route, the best price is Rs41,287. Depending on when you book and the availability, these fares could change.

  • To snag cheap flights from Washington DC to SEA, book your ticket one month before your planned departure.

  • June is when you're most likely to land a good deal on a Washington DC to Seattle-Tacoma International Airport ticket. If you're looking to travel during a different time of year, the 'Whole month' tool will show you the lowest prices across every month.

  • Finding a cheap flight ticket from Washington DC to SEA couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll get in touch as soon as there's a better deal.

  • Filters make it easier to dig up a deal for your flight from Washington DC to Seattle-Tacoma International Airport. Choose the airlines, flight times and number of stops that match your plans. Then sort the results by 'Cheapest' to find the best price quickly.

The best time to fly from Washington DC to Seattle-Tacoma International Airport (SEA)

  • May is the quietest month for flights from Washington DC to Seattle-Tacoma International Airport (SEA), while July is the most popular. Pick the ideal time to visit Seattle based on whether you like a laid-back vibe or a lively atmosphere.

  • Before locking in your Washington DC to SEA flight ticket, consider what kind of weather works for you. August is the warmest month in Seattle, with temperatures ranging from 12ºC to 28ºC.

  • Search for cheap tickets from Washington DC to Seattle-Tacoma International Airport in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -1ºC and 11ºC.

More about Seattle

  • After booking your flight from Washington DC to Seattle-Tacoma International Airport, find a hotel that keeps you close to what you want to see. Make one of these accommodation options your base for exploring Seattle:

  • Every great journey has to include a little sightseeing. Pike Place Market, Space Needle and Seattle Skyline are essential stops on your Seattle itinerary.

Explore more of the United States

  • Portland is just one of the many places in the United States waiting to be discovered once you've seen Seattle. Around 209 kilometres away to the south, its best attractions include Portland Japanese Garden, Voodoo Doughnut and Great Northwest.

  • If you're ready to explore another major stop in the United States, head for Vancouver, about 209 kilometres south of Seattle. Vancouver Waterfront, Reconstructed HBC Fort Vancouver and Fort Vancouver National Historic Site Garden are highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.