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Cheap Flights from Washington D.C. to Seattle

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      Compare Washington D.C. to Seattle flight deals

      Find the cheapest month or even day of the year to fly to Seattle

      Book the best Seattle fare with no extra fees

      Flight dealsCheapest monthFind the best routeRoute infoFAQsTips and advice

      Flight deals from Washington D.C. to Seattle

      Looking for a cheap last-minute deal or the best return flight from Washington D.C. to Seattle? If you want to travel next month, return fares start from £188. Find the lowest prices on one-way and return tickets right here.
      Seattle.£75 per passenger.Departing Tue, 17 Nov.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 17 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £75, select.
      Seattle.£93 per passenger.Departing Thu, 3 Dec.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Thu, 3 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £93, select.
      Seattle.£96 per passenger.Departing Thu, 21 Jan.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Thu, 21 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £96, select.
      Seattle.£96 per passenger.Departing Tue, 16 Feb.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Tue, 16 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £96, select.
      Seattle.£107 per passenger.Departing Wed, 17 Mar.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Baltimore Washington International on Wed, 17 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £107, select.
      Seattle.£116 per passenger.Departing Sat, 10 Apr.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Sat, 10 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £116, select.
      Seattle.£138 per passenger.Departing Wed, 13 Jan.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Wed, 13 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £138, select.
      Seattle.£138 per passenger.Departing Sat, 5 Dec.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Sat, 5 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £138, select.
      Seattle.£138 per passenger.Departing Mon, 16 Nov.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Mon, 16 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £138, select.
      Seattle.£138 per passenger.Departing Tue, 16 Feb.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Tue, 16 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £138, select.
      Seattle.£141 per passenger.Departing Wed, 2 Jun.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Baltimore Washington International on Wed, 2 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £141, select.
      Seattle.£148 per passenger.Departing Fri, 10 Sep.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Baltimore Washington International on Fri, 10 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £148, select.
      Seattle.£148 per passenger.Departing Wed, 26 May.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Baltimore Washington International on Wed, 26 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £148, select.
      Seattle.£148 per passenger.Departing Tue, 20 Jul.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Tue, 20 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £148, select.
      Seattle.£148 per passenger.Departing Mon, 2 Aug.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Mon, 2 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £148, select.
      Seattle.£155 per passenger.Departing Sat, 31 Oct.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sat, 31 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £155, select.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Washington D.C. to Seattle found in the last 12 days, and are subject to change and availability.

      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 November.
      Oct
      from £155
      Nov
      from £75
      Dec
      from £93
      Jan
      from £96
      Feb
      from £96
      Mar
      from £107
      Apr
      from £116
      May
      from £148
      Jun
      from £141
      Jul
      from £148
      Aug
      from £148
      Sep
      from £148

      Direct flights from Washington D.C. to Seattle

      Alaska Airlines
      American Airlines
      Austrian Airlines
      Avianca
      Brussels Airlines
      Cathay Pacific
      China Eastern
      Copa
      Delta
      Ethiopian Airlines
      Finnair
      Iberia
      ITA Airways
      Japan Airlines
      Korean Air
      Lufthansa
      Qatar Airways
      Southwest Airlines
      STARLUX Airlines
      United

      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.

      Seattle Lake Union SPB

      2km from central Seattle
      Closest
      Search flights

      Seattle Boeing Fld

      11km from central Seattle
      from £160
      Search flights

      Seattle / Tacoma International

      20km from central Seattle
      Cheapest
      from £75
      Search flights

      Paine Field

      33km from central Seattle
      from £238
      Search flights

      Washington D.C. to Seattle: Flight information

      The things to know before you go.
      Cheapest flight found£75
      Cheapest month to flyNovember
      Average flight time5 hrs, 60 mins
      Most popular airlineAlaska Airlines
      Average flights per week276

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

      There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
      The best price we found for a return flight from Washington D.C. to Seattle is £176. 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 59 minutes is the average flight time from Washington D.C. to Seattle.
      Alaska Airlines, Qatar Airways and Cathay Pacific fly direct from Washington D.C. to Seattle.
      As of October 2026, there are 276 flights per week flying from Washington D.C. to Seattle.
      The cheapest month to fly from Washington D.C. to Seattle is usually December.
      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 centre of Seattle. We've found flights into this airport from £176.
      After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Seattle on Saturday, 5 December 2026.
      Yes – the average flight time is 5 hours and 59 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 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.

      In October, the average temperature is usually around 13°C. August is typically the warmest month in Seattle, when it usually averages around 25°C. You can expect the least rain in July. The coldest month is January, with temperatures averaging 4°C. The rainiest month is December.
      The cheapest airline that flies to Seattle is KLM. And the cheapest airline that flies to Seattle Boeing Fld Airport is Alaska Airlines.

      How to find cheap flights to Seattle from Washington D.C.

      Looking for cheap tickets from Washington D.C. to Seattle? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

      • Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Washington D.C. to Seattle. And with us there are no hidden fees - what you see is what you pay.
      • Compare flight deals to Seattle from Washington D.C. from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
      • Flex your dates to find the best Washington D.C.-Seattle ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Seattle from Washington D.C..
      • Set up a Price Alert. You can easily track the fare of your cheap Washington D.C.-Seattle flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
      • Fly without stops. Only interested in direct flights between Washington D.C. and Seattle? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results.
      • Find the cheapest Business class flights from Washington D.C. and Seattle. We scour the internet for the best Business, Premium Economy and First Class flight fares to Seattle, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
      • Include nearby airports in your search. Widen your search for Washington D.C. to Seattle flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.

        • Combine your flight to Seattle from Washington D.C. with hotels and car hire

        Once you've secured your cheap flight ticket from Washington D.C. to Seattle, discover the best prices and exclusive rates for hotels in Seattle or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.


      Plan the rest of your trip from Washington D.C. to Seattle

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.