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Cheap Flights from Seattle to Washington D.C.

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Find the cheapest month or even day of the year to fly to Washington D.C.

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Flight deals from Seattle to Washington D.C.

Looking for a cheap last-minute deal or the best return flight from Seattle to Washington D.C.? Find the lowest prices on one-way and return tickets right here.
Washington D.C..$310 per passenger.Departing Wed, 7 May, returning Sat, 10 May.Return flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Seattle / Tacoma International on Wed, 7 May, arriving in Baltimore Washington International.Inbound indirect flight with Spirit Airlines, departs from Baltimore Washington International on Sat, 10 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $310, select.
Washington D.C..$327 per passenger.Departing Mon, 3 Nov, returning Fri, 7 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Mon, 3 Nov, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Fri, 7 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $327, select.
Washington D.C..$327 per passenger.Departing Fri, 30 May, returning Tue, 3 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Fri, 30 May, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Tue, 3 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $327, select.
Washington D.C..$328 per passenger.Departing Tue, 15 Apr, returning Tue, 22 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Tue, 15 Apr, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Tue, 22 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $328, select.
Washington D.C..$328 per passenger.Departing Thu, 3 Jul, returning Sat, 12 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Thu, 3 Jul, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Sat, 12 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $328, select.
Washington D.C..$328 per passenger.Departing Wed, 4 Jun, returning Tue, 10 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 4 Jun, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Tue, 10 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $328, select.
Washington D.C..$346 per passenger.Departing Wed, 30 Apr, returning Mon, 5 May.Return flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Seattle / Tacoma International on Wed, 30 Apr, arriving in Baltimore Washington International.Inbound indirect flight with Spirit Airlines, departs from Baltimore Washington International on Mon, 5 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $346, select.
Washington D.C..$369 per passenger.Departing Wed, 1 Oct, returning Fri, 10 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 1 Oct, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Fri, 10 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $369, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Washington D.C. flights are currently cheapest in May.
Mar
from $603
Apr
from $328
May
from $310
Jun
from $328
Jul
from $328
Aug
from $369
Sep
from $457
Oct
from $369
Nov
from $327
Dec
from $457
Jan
Find prices
Feb
Find prices

Direct flights from Seattle to Washington D.C.

Alternative Seattle to Washington D.C. routes

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

Seattle to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found$310
Cheapest month to flyMay
Average flight time5 hrs, 5 mins
Most popular airlineAir Tahiti Nui
Average flights per week377

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

There are 5 airports in Washington D.C.: Washington Ronald Reagan, Camp Springs Andrews AFB, Washington Dulles, Baltimore Washington International, and Manassas.
The best price we found for a return flight from Seattle to Washington D.C. is $310. 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 4 minutes is the average flight time from Seattle to Washington D.C..
Air Tahiti Nui, Alaska Airlines and Qatar Airways fly direct from Seattle to Washington D.C..
As of March 2025, there are 377 flights per week flying from Seattle to Washington D.C..
The cheapest month to fly from Seattle to Washington D.C. is usually May.
If you're flying from Seattle, the cheapest airport near Washington D.C. is Baltimore Washington International – which is 43.6 km away from the centre of Washington D.C.. We've found flights into this airport from $310.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Washington D.C. on Wednesday, 7 May 2025.
Yes – the average flight time is 5 hours and 4 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 Washington D.C. 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 Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 6°C. July is typically the warmest month in Washington D.C., when it usually averages around 31°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -4°C. The rainiest month is September.
The cheapest airline that flies to Washington D.C. is Spirit Airlines. And the cheapest airline that flies to Camp Springs Andrews AFB Airport is Alaska Airlines.

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

  • Start your adventure at Seattle-Tacoma International Airport (SEA), the main airport in Seattle. Look for flights from Seattle to Washington DC that fly out of this base.

  • The major entry paths to Washington DC are Ronald Reagan National Airport (DCA) and Washington Dulles International Airport (IAD).

  • The average duration of a direct flight from Seattle to Washington DC is 5 hours 4 minutes. Washington DC's timezone is UTC-4, which makes Washington DC 3 hours ahead of Seattle.

  • The most popular route for flights from Seattle to Washington DC is from Seattle-Tacoma International Airport (SEA) to Washington Dulles International Airport (IAD). Choose from 114 services every week between these two airports. If you'd like to get going as soon as possible, the earliest flight from SEA to IAD is the 07:00 Alaska Airlines service. If you have other commitments or plans on your day of travel, the final departure is at 23:43 with Alaska Airlines.

  • To ensure you get on your flight from Seattle to Washington DC, leave enough time to check in and find your gate. Turning up two hours ahead of international departures and an hour before domestic flights is the general travel rule.

  • Taking off during a peak period like public or school holidays? Expect longer queues at check-in and security. Give yourself extra leeway and arrive up to four hours before international flights and two hours before domestic departures.

  • You won't need a visa or passport to travel within United States. You will need a valid proof of identity though, like an ID card or driver's licence. Add them to your packing list once you've booked cheap flights from Seattle to Washington DC.

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

  • Take off from Seattle-Tacoma International Airport (SEA) on a direct flight from Seattle to Washington DC. These Washington DC airports are easily accessible from SEA:

    • Ronald Reagan National Airport (DCA)

    • Washington Dulles International Airport (IAD)

    • Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Choose from a variety of airlines that offer direct flights from Seattle to Washington DC leaving from SEA. Book your ticket with one of these:

  • We make it a piece of cake to plan a flight from Seattle to Washington DC with a stopover. To see the options departing from Seattle-Tacoma International Airport, uncheck 'Direct flights only.' Then, simply select a flight offering a stop long enough to tour the city of your choice. Major stopovers include:

    • Detroit Metropolitan Wayne County Airport (DTW)

    • Minneapolis-St. Paul International Airport (MSP)

    • O'Hare International Airport (ORD)

  • The journey from central Seattle to SEA takes approximately 54 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 23 kilometres in 18 minutes or so, depending on traffic.

  • Booked an early flight from Seattle to Washington DC? Avoid the hassle of rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels near Seattle-Tacoma International Airport:

Lake Union Sea Plane Base Airport (LKE)

  • Break up your flight from Seattle to Washington DC with a stop so you can freshen up or perhaps go somewhere you've never been before. Some top stopovers between Seattle-Tacoma International Airport and Washington DC include:

    • Detroit Metropolitan Wayne County Airport (DTW)

    • Minneapolis-St. Paul International Airport (MSP)

    • O'Hare International Airport (ORD)

  • LKE is around 3 kilometres from central Seattle. It'll take 11 minutes or so to get to the airport in a car from the city centre. Public transport takes approximately 23 minutes.

  • Want to enjoy an extra night away before catching your flight from Seattle to Washington DC? Relax in a hotel near Lake Union Sea Plane Base Airport before your adventure officially begins. Consider one of these stays:

Arriving in Washington DC

Ronald Reagan National Airport (DCA)

  • Ronald Reagan National Airport (DCA) is around 8 kilometres from central Washington DC. With a cab or in your own car rental, the drive is about 16 minutes.

  • When travelling by public transport, expect a journey of roughly 43 minutes.

  • The last thing you need is a long journey to your hotel if you're landing late on a flight from Seattle to Washington DC. Book one of these accommodation options near DCA instead:

Washington Dulles International Airport (IAD)

How to find the cheapest flights from Seattle to Washington DC

  • The cheapest price we've seen for a one-way ticket from Seattle to Washington DC is $154. For a return flight on this route, the best price is $310. Depending on when you want to go and the availability, these fares can change.

  • Book 9 months before your departure date. After looking at the numbers on our calendar, this is how far you'll want to book ahead to secure cheap tickets from Seattle to Washington DC.

  • May is the cheapest month for flight tickets from Seattle to Washington DC. If you need to travel at a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

  • Log into your online account or use the app to create a Price Alert. We'll notify you right away if there's a better deal on this route. It's easy to do, and it'll save you the hassle of checking for cheap tickets from Seattle to Washington DC every day.

  • Tailor your flights using filters. Pick your arrival and departure times, total journey duration and airlines. You can also sort results by 'Best,' 'Fastest' or 'Cheapest' flights from Seattle to Washington DC.

Best time to go to Washington DC

  • July is the most popular month for flights from Seattle to Washington DC. To steer clear of the crowds, head to Washington DC in May.

  • Lock in your flight from Seattle to Washington DC for July if you'd like to head to the city during its warmest month. Expect temperatures in Washington DC to range from 19ºC to 33ºC.

  • January has average temperatures of between -6ºC and 10ºC. Look for cheap tickets from Seattle to Washington DC around that time if you want to travel in cooler conditions.

More about Washington DC

  • Once you've booked your flight from Seattle to Washington DC, think about where to rest your head in this city. Make one of these accommodation options your base for exploring Washington DC:

  • Every great holiday has to include some sightseeing. White House Historical Association, The White House and National Mall are must-visits when exploring Washington DC.

Complete your Washington DC trip with a car rental

  • Finding you a cheap flight from Seattle to Washington DC isn't the only trick up our sleeve. Check out our car rentals in Washington DC and see the sights your way. We find deals from trusted car rental providers and put them all in one place. You can instantly compare offers and then book with no fees.

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

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