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Cheap flights from Seattle to Washington, D.C.

Your route at a glance

Cheapest deal$132
Cheapest monthJanuary
Average flight duration5 hours and 4 minutes
Most popular airlineUnited

Compare Seattle to Washington, D.C. flight deals

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Flight deals from Seattle to Washington, D.C.

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Washington, D.C.? Find the lowest prices on one-way and round-trip tickets right here.
Washington, D.C..$132 per passenger.Departing Fri, Jan 23, returning Wed, Jan 28.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Fri, Jan 23, arriving in Washington Ronald Reagan.Inbound indirect flight with Frontier Airlines, departing from Washington Ronald Reagan on Wed, Jan 28, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $132, select.
Washington, D.C..$149 per passenger.Departing Sun, Feb 22, returning Sun, Mar 1.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Sun, Feb 22, arriving in Washington Ronald Reagan.Inbound indirect flight with Frontier Airlines, departing from Washington Ronald Reagan on Sun, Mar 1, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $149, select.
Washington, D.C..$149 per passenger.Departing Sun, Jan 25, returning Sun, Feb 1.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Sun, Jan 25, arriving in Washington Ronald Reagan.Inbound indirect flight with Frontier Airlines, departing from Washington Ronald Reagan on Sun, Feb 1, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $149, select.
Washington, D.C..$165 per passenger.Departing Sun, Feb 1, returning Sat, Feb 28.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Sun, Feb 1, arriving in Washington Ronald Reagan.Inbound indirect flight with Frontier Airlines, departing from Washington Ronald Reagan on Sat, Feb 28, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $165, select.
Washington, D.C..$180 per passenger.Departing Thu, Mar 12, returning Tue, Mar 17.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Thu, Mar 12, arriving in Baltimore Washington International.Inbound indirect flight with Southwest Airlines, departing from Baltimore Washington International on Tue, Mar 17, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $180, select.
Washington, D.C..$188 per passenger.Departing Sat, Jan 31, returning Sat, Feb 14.Round-trip flight with Hawaiian Airlines.Outbound direct flight with Hawaiian Airlines departing from Seattle / Tacoma International on Sat, Jan 31, arriving in Washington Dulles.Inbound direct flight with Hawaiian Airlines departing from Washington Dulles on Sat, Feb 14, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $188, select.
Washington, D.C..$189 per passenger.Departing Wed, Jan 21, returning Tue, Jan 27.Round-trip flight with Hawaiian Airlines.Outbound direct flight with Hawaiian Airlines departing from Seattle / Tacoma International on Wed, Jan 21, arriving in Washington Ronald Reagan.Inbound direct flight with Hawaiian Airlines departing from Washington Ronald Reagan on Tue, Jan 27, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $189, select.
Washington, D.C..$197 per passenger.Departing Thu, Feb 5, returning Mon, Feb 9.Round-trip flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departing from Seattle / Tacoma International on Thu, Feb 5, arriving in Washington Dulles.Inbound direct flight with Alaska Airlines departing from Washington Ronald Reagan on Mon, Feb 9, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $197, 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 January.
Dec
from $386
Jan
from $132
Feb
from $165
Mar
from $180
Apr
from $249
May
from $198
Jun
from $317
Jul
from $214
Aug
from $315
Sep
from $317
Oct
from $249
Nov
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.

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 round-trip flight from Seattle to Washington, D.C. is $132. 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..
Hawaiian Airlines, Air Tahiti Nui and Alaska Airlines fly direct from Seattle to Washington, D.C..
There are 310 flights per week flying from Seattle to Washington, D.C., as of December 2025.
The cheapest month to fly from Seattle to Washington, D.C. is usually January.
If you're flying from Seattle, the cheapest airport near Washington, D.C. is Washington Ronald Reagan – which is 5.5 km away from the center of Washington, D.C.. We've found flights to this airport from $132.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Washington, D.C. on Friday, January 23, 2026.
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 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.
The cheapest airline that flies to Washington, D.C. is Frontier Airlines, and the cheapest airline that flies to Camp Springs Andrews AFB Airport is Hawaiian Airlines.

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

  • Seattle's main airport is Seattle-Tacoma International Airport (SEA). Explore your options for leaving from this terminal when searching for your flights from Seattle to Washington DC.

  • Ronald Reagan National Airport (DCA) and Washington Dulles International Airport (IAD) are the chief entry points to Washington DC.

  • The average length of a direct Seattle to Washington DC flight is 5 hours 5 minutes.

  • The timezone in Washington DC is UTC-4, which is three 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). Take your pick of 40 weekly services between these two airports. If you want to get going as soon as possible, the earliest flight from SEA to IAD is the 08:00 United Airlines option. If you have other commitments or plans on your day of travel, the latest available service is at 23:40 with Alaska Airlines.

  • Leave plenty of time to catch your Seattle to Washington DC flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Traveling during a peak month such as July? Public holidays and other popular periods can lead to longer queues at security. Play it safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.

How to find the cheapest flights from Seattle to Washington DC

  • Score cheap Seattle to Washington DC flights by booking two months ahead. According to our research, that's the ideal time frame for bagging a bargain.

  • The best month for scoring cheap plane tickets from Seattle to Washington DC is May. Use the 'Whole month' tool to compare flight prices, then choose the dates with the lowest fares.

  • Finding a cheap flight from Seattle to Washington DC is easy with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as a better deal is available.

  • Save money on your Seattle to Washington DC flight with the help of our filters. Select your preferred times, airlines and number of stops, then sort the results by 'Cheapest' to see the best deals.

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

  • You can find a direct flight from Seattle to Washington DC departing from Seattle-Tacoma International Airport (SEA). Hop on your plane at SEA and then touch down at one of these Washington DC airports:

    • Ronald Reagan National Airport (DCA)

    • Washington Dulles International Airport (IAD)

    • Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Well-known carriers that offer direct Seattle to Washington DC plane tickets departing from SEA include:

  • Traveling from central Seattle to SEA takes about 55 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 18 kilometers in 20 minutes or so, depending on traffic conditions.

  • After a leisurely start to your break? Stay near Seattle-Tacoma International Airport. Whether you're boarding an early flight from Seattle to Washington DC or just don't want to be rushed, these hotels are perfect:

  • 81.27% of flights leaving Seattle-Tacoma International Airport touch down at their destination on time. With its dependable on-time performance, delays are unlikely when taking off from SEA.

Arriving in Washington DC

Ronald Reagan National Airport (DCA)

  • Ronald Reagan National Airport (DCA) to central Washington DC takes around 15 minutes by car. The center is roughly 5 kilometers away.

  • Getting there on public transport typically takes 45 minutes.

  • Reserve a hotel close to DCA if you're coming in on a late flight from Seattle to Washington DC. Pick one of these accommodation options and avoid the hassle of a long transfer:

  • Get on the fast track to adventure by picking up a Ronald Reagan National Airport rental car. Grab your wheels from Thrifty, Sixt or Dollar and explore beyond Washington DC's main sights.

  • To get the lowest price, reserve your ride from Ronald Reagan National Airport about four weeks in advance of your Seattle to Washington DC flight.

  • The street address for DCA is 1 Aviation Circle.

Washington Dulles International Airport (IAD)

  • Central Washington DC is approximately 40 kilometers from Washington Dulles International Airport (IAD). As soon as your flight from Seattle to Washington DC has hit the runway and you've made your way out of the airport, expect a drive of about 50 minutes.

  • The journey will take approximately 1 hour 10 minutes on public transport.

  • Place the 'Do not disturb' sign on your door and unwind at a hotel close to IAD. Here are a few options where you can check in after your flight from Seattle to Washington DC:

  • Dollar, Thrifty and Sixt make collecting a Washington Dulles International Airport rental car quick and easy. These reliable suppliers are located in or around the terminal and will have you behind the wheel before you know it.

  • Get exactly what you want. Booking your ride from IAD one week ahead of time often means more savings and a greater range of vehicles.

  • The address for Washington Dulles International Airport is 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Head to the city center after your flight from Seattle to Washington DC has landed. Central Washington DC is about 40 kilometers from Baltimore/Wash International Thurgood Marshall Airport (BWI) and takes roughly 50 minutes to reach by cab or ride-share.

  • The journey will take you about 1 hour 30 minutes on public transport.

  • Check in to a hotel near BWI and quickly go from touchdown to tucked into your bed. Whether you have a late Seattle to Washington DC flight or just want to keep your travel plans simple, these accommodation options will have you settling in quickly:

  • Begin your travels without stressing about how to reach your destination with a Baltimore/Wash International Thurgood Marshall Airport rental car. Book your wheels with trusted names here like Dollar, Thrifty and Budget.

  • About two weeks before your flight from Seattle to Washington DC is the ideal time to book your ride from BWI. You're likely to find a better rate or score some early bird savings.

Best time to go to Washington DC

  • February is the most popular month for flights from Seattle to Washington DC. To escape the crowds, go to Washington DC in May.

  • The warmest month in Washington DC is July, with temperatures ranging between 19ºC (66ºF) and 33ºC (91ºF). Lock in your Seattle to Washington DC ticket then if that's your idea of comfortable weather.

  • If you want to travel in cooler conditions, look for a cheap flight from Seattle to Washington DC in January when temperatures average between -6ºC (21ºF) and 10ºC (50ºF).

More about Washington DC

Explore more of United States

  • Washington DC has its own special appeal, but there are so many other corners of United States you should also see. Around 322 kilometers north-east of Washington DC, a visit to New York will keep your itinerary packed. Check out popular attractions like Statue of Liberty, Central Park and Empire State Building.

  • Philadelphia is another must-experience destination in United States and is around 193 kilometers north-east of Washington DC. No journey is complete without experiencing Liberty Bell, Independence Hall and Philadelphia Museum of Art.

More travel options

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.