Cheap air tickets from Seattle / Tacoma International to Washington D.C.

Compare Seattle / Tacoma International to Washington D.C. flight deals

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

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

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

Find the cheapest month to fly from Seattle / Tacoma International 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 / Tacoma International to Washington D.C. flights are currently cheapest in February.

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

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

Looking for the cheapest, fastest or easiest route from Seattle / Tacoma International 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$93
Cheapest month to flyFebruary
Average flight time5 hrs, 3 mins
Most popular airlineHawaiian Airlines
Average flights per week306

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

There are 5 airports in Washington D.C.: Washington Ronald Reagan, Washington Dulles, Baltimore Washington International, Manassas, and Baltimore Glenn L Martin.
The best price we found for a return flight from Seattle / Tacoma International to Washington D.C. is $171. 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 3 minutes is the average flight time from Seattle / Tacoma International to Washington D.C..
Hawaiian Airlines, Air Tahiti Nui and Alaska Airlines fly direct from Seattle / Tacoma International to Washington D.C..
As of December 2024, there are 612 flights per week flying from Seattle / Tacoma International to Washington D.C..
The cheapest month to fly from Seattle / Tacoma International to Washington D.C. is usually December 2024.
If you're flying from Seattle / Tacoma International Airport, the cheapest airport near Washington D.C. is Washington Ronald Reagan – which is 5.5 km away from the centre of Washington D.C.. We've found flights into this airport from $171.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Washington D.C. on Thursday, 30 January 2025.
Yes – the average flight time is 5 hours and 3 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 December, the average temperature is usually around 2°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.
Currently, Frontier Airlines and Delta offer the cheapest flight tickets to Washington D.C..

Complete your Washington DC trip with a car rental

  • Finding you a cheap flight from Seattle-Tacoma International Airport to Washington DC isn't our only cool trick. Check out our car rentals in Washington DC and have more freedom to explore. We search for deals from trusted car rental providers and put them all in one place. Instantly compare offers and then book with no fees.

More about Washington DC

  • When it comes to looking for somewhere to lay your head, you'll find the most popular stays in Washington DC right here. Explore these options after locking in your flight from Seattle-Tacoma International Airport to Washington DC:

  • There are so many things to explore in this city it can be hard to figure out where to start. White House Historical Association, The White House and National Mall are popular attractions which should feature on every Washington DC itinerary.

Best time to go to Washington DC

  • It's time to work out your trip dates for your flight from Seattle-Tacoma International Airport to Washington DC. July is the most popular month for a trip to Washington DC. If you prefer a more relaxed atmosphere, go in May.

  • Before you book a flight from Seattle-Tacoma International Airport to Washington DC, think about the type of weather you enjoy. July is the warmest month in Washington DC, with temperatures ranging from 19ºC to 33ºC.

  • If you want cooler conditions, search for a cheap flight from SEA to Washington DC in January when temperatures average between -6ºC and 10ºC.

Washington Dulles International Airport (IAD)

Airports in Washington DC

Ronald Reagan National Airport (DCA)

  • Ronald Reagan National Airport (DCA) to the centre of Washington DC takes around 16 minutes by car. It's approximately 8 kilometres away.

  • Getting to the centre on public transport takes roughly 43 minutes.

  • If you're arriving on a late flight from Seattle-Tacoma International Airport to Washington DC, few things beat the convenience of staying near the terminal. Grab your bags from the carousel and then be showered and relaxing soon after at one of these accommodation options near DCA:

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

  • $93 is the lowest price we've found for a one-way ticket from Seattle-Tacoma International Airport to Washington DC. For a return flight on this route, the best price is $171. Depending on when you want to go and the availability, these fares can change.

  • Book 9 months before flying. After crunching the numbers on our calendar, this is how far you'll want to book ahead to find cheap tickets from SEA to Washington DC.

  • May is the cheapest month for tickets from Seattle-Tacoma International Airport to Washington DC. If you're looking to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • Create a Price Alert for cheap tickets from SEA to Washington DC. You don't need to search every day to see whether fares have dropped. We'll notify you as soon as the price changes.

  • Tailor your flights with filters. Select your ideal departure and arrival times, airlines and total journey duration. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from Seattle-Tacoma International Airport to Washington DC.

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

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

  • Seattle-Tacoma International Airport is located in Seattle. Operating on the UTC-4 timezone, Washington DC is 3 hours ahead of Seattle.

  • With 114 weekly flights between the two airports, Seattle-Tacoma International Airport (SEA) to Washington Dulles International Airport (IAD) is the busiest route. Alaska Airlines operates the earliest flight at 07:00. If you're eager to make the most of your day before you fly, the latest departure from SEA to IAD is with Alaska Airlines at 23:43.

  • Leave plenty of time to catch your flight from SEA to Washington DC. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Getting on a plane during a peak month like July? Busy periods (like Thanksgiving, Christmas/New Year and spring break) can add another hour at security. Play things extra safe and arrive up to four hours before international flights and two hours before a domestic departure.

  • Begin your journey with a direct flight from Seattle-Tacoma International Airport to Washington DC. From SEA, you can fly without any stops to any of these Washington DC airports:

    • Ronald Reagan National Airport (DCA)

    • Washington Dulles International Airport (IAD)

    • Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Pick from a variety of airlines offering direct flights from Seattle-Tacoma International Airport to Washington DC. Head off on your trip with any of these:

  • When flying within United States, you don't need a passport or visa. However, you'll have to bring another kind of identification, like a driver's licence or ID card. Once you've booked cheap tickets from Seattle-Tacoma International Airport to Washington DC, make sure your ID is up to date.

  • SEA is around 23 kilometres from central Seattle. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 18 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the travel time to be around 54 minutes.

  • After a hassle-free start to your journey? Stay near SEA. Whether you're taking an early flight from Seattle-Tacoma International Airport to Washington DC or just don't like being rushed, these hotels are ideal:

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