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C$136 Cheap Flights from Seattle / Tacoma International (SEA) to Washington Ronald Reagan (DCA)

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Flight deals from Seattle / Tacoma International to Washington Ronald Reagan

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Washington Ronald Reagan Airport? If you want to travel next month, return fares start from C$390. Find the lowest prices on one-way and return tickets right here.
Washington D.C..C$136 per passenger.Departing Fri., Jul. 31.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri., Jul. 31, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$136, select.
Washington D.C..C$142 per passenger.Departing Wed., Jun. 24.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed., Jun. 24, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$142, select.
Washington D.C..C$190 per passenger.Departing Wed., Aug. 26.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Wed., Aug. 26, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$190, select.
Washington D.C..C$190 per passenger.Departing Tue., Oct. 6.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Seattle / Tacoma International on Tue., Oct. 6, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$190, select.
Washington D.C..C$190 per passenger.Departing Sat., Sep. 19.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Sat., Sep. 19, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$190, select.
Washington D.C..C$213 per passenger.Departing Wed., Jul. 8.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Wed., Jul. 8, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$213, select.
Washington D.C..C$238 per passenger.Departing Wed., Aug. 26.One-way flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Wed., Aug. 26, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$238, select.
Washington D.C..C$238 per passenger.Departing Wed., Sep. 16.One-way flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Wed., Sep. 16, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$238, select.
Washington D.C..C$239 per passenger.Departing Wed., Jun. 17.One-way flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Wed., Jun. 17, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$239, select.
Washington D.C..C$271 per passenger.Departing Tue., Oct. 6.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Tue., Oct. 6, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$271, select.
Washington D.C..C$289 per passenger.Departing Mon., Nov. 2.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Mon., Nov. 2, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$289, select.
Washington D.C..C$295 per passenger.Departing Tue., Jan. 5.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Tue., Jan. 5, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$295, select.
Washington D.C..C$296 per passenger.Departing Wed., Dec. 16.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Wed., Dec. 16, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$296, select.
Washington D.C..C$310 per passenger.Departing Mon., Nov. 2.One-way flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Mon., Nov. 2, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$310, select.
Washington D.C..C$323 per passenger.Departing Thu., Apr. 15.One-way flight with United.Outbound indirect flight with United, departs from Seattle / Tacoma International on Thu., Apr. 15, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$323, select.
Washington D.C..C$327 per passenger.Departing Tue., Jan. 5.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Tue., Jan. 5, arriving in Washington Ronald Reagan.Price includes taxes and charges.From C$327, select.

Find the cheapest month to fly from Seattle / Tacoma International to Washington Ronald Reagan

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 Ronald Reagan flights are currently cheapest in July.
May
from C$375
Jun.
from C$142
Jul.
from C$136
Aug.
from C$190
Sep.
from C$190
Oct.
from C$190
Nov.
from C$289
Dec.
from C$296
Jan.
from C$295
Feb.
from C$345
Mar.
from C$344
Apr.
from C$323

Which airlines fly from Seattle / Tacoma International to Washington Ronald Reagan?

Seattle / Tacoma International to Washington Ronald Reagan: Alternative routes

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

Washington Ronald Reagan

5km from central Washington D.C.
ClosestCheapest
from C$136
Search flights

Camp Springs Andrews AFB

17km from central Washington D.C.
Search flights

Washington Dulles

37km from central Washington D.C.
from C$143
Search flights

Baltimore Washington International

44km from central Washington D.C.
from C$144
Search flights

Manassas

47km from central Washington D.C.
Search flights

Seattle to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight foundC$136
Cheapest month to flyJuly
Average flight time5 hrs, 13 mins
Most popular airlineAlaska Airlines
Average flights per week37

Finding cheap flights from Seattle / Tacoma International to Washington Ronald Reagan: Frequently asked questions

The best price we found for a return flight from Seattle / Tacoma International to Washington Ronald Reagan is C$320. 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 13 minutes is the average flight time from Seattle / Tacoma International to Washington Ronald Reagan.
Alaska Airlines, Delta and Japan Airlines fly direct from Seattle / Tacoma International to Washington Ronald Reagan.
As of May 2026, there are 37 flights per week flying from Seattle / Tacoma International to Washington Ronald Reagan.
The cheapest month to fly from Seattle / Tacoma International to Washington Ronald Reagan is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Washington Ronald Reagan Airport on Friday, July 31, 2026.
Yes – the average flight time is 5 hours and 13 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 Ronald Reagan 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.
Currently, Frontier Airlines and Delta offer the cheapest flight tickets to Washington Ronald Reagan.

Flying from Seattle-Tacoma International Airport (SEA) to Ronald Reagan National Airport (DCA): what you need to know

  • The average time for a direct flight from Seattle-Tacoma International Airport to Ronald Reagan National Airport is 5 hours 6 minutes. Washington DC's timezone is UTC-4, making Washington DC 3 hours ahead of Seattle.

  • Every week, there are 14 flights from Seattle-Tacoma International Airport to Ronald Reagan National Airport. If you want to be on board as soon as possible, opt for the 08:00 Alaska Airlines flight. If you'd rather make the most of your time before you fly, the latest flight from SEA to DCA is 17:50 with Alaska Airlines.

  • If you're getting away during a peak month like July, be at the airport even earlier. It's smart to arrive up to four hours before international flights and two hours ahead of domestic departures. Security lines will be longer during vacation periods like summer and spring break.

  • If you'd like to break up your flight from Seattle-Tacoma International Airport to Ronald Reagan National Airport, think about adding a stopover. Just uncheck 'Direct flights only' to find a destination that interests you. The most popular stopovers on the SEA - DCA route include:

    • Minneapolis-St. Paul International Airport

    • Nashville International Airport

    • Denver International Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Ronald Reagan National Airport (DCA)

  • C$136 is the best price for a one-way ticket from Seattle-Tacoma International Airport to Ronald Reagan National Airport. A return flight starts from C$320. These prices can change depending on availability.

  • Score cheap flight tickets from SEA to DCA by booking at least 10 months ahead. According to our research, that's the sweet spot for finding the biggest deals.

  • Schedule your trip for June. That's the cheapest month for flight tickets from Seattle-Tacoma International Airport to Ronald Reagan National Airport. If you have flexibility with your dates, try out the 'Whole month' tool to find the cheapest price across each month.

  • Getting a cheap ticket from SEA to DCA is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know when there's a better deal.

  • Use filters to tailor your flights from Seattle-Tacoma International Airport to Ronald Reagan National Airport. Enter your preferred arrival and departure times, airlines and number of stops. Alternatively, sort your results by 'Cheapest' to see the best deals.

Handy information about Seattle-Tacoma International Airport (SEA)

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

  • Searching for a handy hotel close to SEA? If you're catching an early flight from Seattle-Tacoma International Airport to Ronald Reagan National Airport, these accommodation options will have you moments from your departure gate:

Arriving at Ronald Reagan National Airport (DCA)

Getting from Ronald Reagan National Airport (DCA) to central Washington DC

  • From Ronald Reagan National Airport, Washington DC is approximately 8 kilometres away. It takes around 16 minutes to get to the center driving.

  • If you're traveling by public transport, expect a journey of about 43 minutes.

When to fly to Ronald Reagan National Airport (DCA)

  • The quietest month for a flight from Seattle-Tacoma International Airport to Ronald Reagan National Airport is May, while July is the most popular. Pick the best time to go to Washington DC based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • When reserving your flight from Seattle-Tacoma International Airport to Ronald Reagan National Airport, consider the kind of weather you enjoy. July is the warmest month in Washington DC, with the temperature ranging from 19ºC to 33ºC.

  • January sees average temperatures of between -6ºC and 10ºC. Look for cheap flight tickets from SEA to DCA sometime then if you want to travel in cooler conditions.

More about Washington DC

  • When it comes to looking for somewhere to lay your head, you'll find the top stays in Washington DC right here. Explore these options once you've locked in your flight from SEA to DCA:

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

Complete your Washington DC trip with hotels and a car rental

  • After you've secured your cheap ticket to Ronald Reagan National Airport, discover the lowest prices and exclusive offers on hotels. You can also compare hundreds of car rental companies in one place to get the best car rental price for your Washington DC vacation.

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.