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$129 Cheap Flights from Seattle (SEA) to Washington (DCA)

View $129 flight on Tue, Sep 22, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Ronald Reagan Washington National Airport (DCA)

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Cheap Flights from Seattle to Washington (SEA-DCA)

Prices were available within the past 7 days and start at $129 for one-way flights and $246 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Sep 12 - Mon, Sep 14
SEA
Seattle
DCA
Washington
$246 Roundtrip, just found
$246
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Sep 12 from Seattle to Washington, returning Mon, Sep 14, priced at $246 just found
Frontier Airlines
Sat, Sep 12 - Mon, Sep 14
SEA
Seattle
DCA
Washington
$256 Roundtrip, just found
$256
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Sep 12 from Seattle to Washington, returning Mon, Sep 14, priced at $256 just found
Alaska Airlines
Wed, Aug 26 - Mon, Aug 31
SEA
Seattle
DCA
Washington
$261 Roundtrip, found 19 hours ago
$261
Roundtrip
found 19 hours ago
Select Alaska Airlines flight, departing Wed, Aug 26 from Seattle to Washington, returning Mon, Aug 31, priced at $261 found 19 hours ago
Alaska Airlines
Wed, Aug 26 - Sat, Sep 5
SEA
Seattle
DCA
Washington
$263 Roundtrip, found 10 hours ago
$263
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Wed, Aug 26 from Seattle to Washington, returning Sat, Sep 5, priced at $263 found 10 hours ago
Southwest Airlines
Thu, Aug 20 - Tue, Aug 25
SEA
Seattle
DCA
Washington
$266 Roundtrip, just found
$266
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, Aug 20 from Seattle to Washington, returning Tue, Aug 25, priced at $266 just found
Southwest Airlines
Fri, Aug 21 - Thu, Aug 27
SEA
Seattle
DCA
Washington
$266 Roundtrip, just found
$266
Roundtrip
just found
Select Southwest Airlines flight, departing Fri, Aug 21 from Seattle to Washington, returning Thu, Aug 27, priced at $266 just found
United
Fri, Sep 25 - Sat, Sep 26
SEA
Seattle
DCA
Washington
$269 Roundtrip, found 3 hours ago
$269
Roundtrip
found 3 hours ago
Select United flight, departing Fri, Sep 25 from Seattle to Washington, returning Sat, Sep 26, priced at $269 found 3 hours ago
Alaska Airlines
Wed, Sep 30 - Fri, Oct 2
SEA
Seattle
DCA
Washington
$271 Roundtrip, just found
$271
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Sep 30 from Seattle to Washington, returning Fri, Oct 2, priced at $271 just found
Frontier Airlines
Sat, Sep 12 - Mon, Sep 14
SEA
Seattle
DCA
Washington
$271 Roundtrip, just found
$271
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Sep 12 from Seattle to Washington, returning Mon, Sep 14, priced at $271 just found
American Airlines
Thu, Sep 10 - Wed, Sep 16
SEA
Seattle
DCA
Washington
$275 Roundtrip, found 4 hours ago
$275
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Thu, Sep 10 from Seattle to Washington, returning Wed, Sep 16, priced at $275 found 4 hours ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Average driving time to city center is 40 minutes. Flights from $572
BWI
Baltimore Washington Intl. Thurgood Marshall
Average driving time to city center40 min
Flights from $572

What you need to know for your flight from Seattle - Tacoma Intl. to Ronald Reagan Washington National

Seattle (SEA) to Washington (DCA) at a glance

Explore a range of airlines offering flights from Seattle-Tacoma International Airport (SEA) to Ronald Reagan Washington National Airport (DCA) on this domestic long-haul route. Whether you’re looking for the lowest fares from Seattle or options from full-service and budget carriers, you can compare itineraries that fit your travel budget and schedule. Get ready to discover the iconic sights and neighborhoods of Washington as you plan your trip from Seattle to Washington.

  • Fastest flight duration: around 5 hours non-stop
  • Route distance: roughly 2,300 miles (3,700 km)
  • Flights per week: around 30+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $110–$490, depending on seasonality and how far ahead you book

Flights from Seattle - Tacoma International Airport (SEA) to Ronald Reagan Washington National Airport (DCA)

Based on recent traveler bookings, we've compiled a list of the most popular airlines flying from Seattle to Washington, focusing on non-stop and one-stop options. Common layover points include O'Hare International Airport (ORD) with a layover of about 1 hour, Denver International Airport (DEN) at approximately 1 hour and 15 minutes, and Charlotte-Douglas International Airport (CLT), also around 1 hour and 15 minutes. These choices allow you to balance price, total travel time, and cabin class for the ideal itinerary.

  • Alaska Airlines: This comprehensive service airline provides both non-stop and one-stop flights, with one-way ticket prices generally between $120 and $555. It represents about 38% of departures on this route, and the average non-stop flight duration is 5 hours.
  • Delta: As a full-service airline, Delta offers both non-stop and one-stop flights, with one-way fares generally falling between $110 and $585. This carrier accounts for roughly 23% of departures, with a typical non-stop travel time of around 5 hours.
  • American Airlines: Providing one-stop service, this full-service airline has one-way prices ranging from $130 to $500. It represents about 13% of the departures, with an in-flight duration of 6 hours and 15 minutes and an overall travel time of approximately 7 hours and 45 minutes, including layover.
  • United: This full-service airline offers both non-stop and one-stop options, with one-way fares usually between $145 and $530. It makes up about 12% of departures on this route, featuring a typical one-stop flight time of 6 hours and 15 minutes, with a total journey duration of around 7 hours and 45 minutes.
  • Frontier Airlines: A budget carrier that provides one-stop service, Frontier's one-way fares typically range from $110 to $285. It holds approximately 5% of departures on this route, with an in-flight time of 6 hours and 15 minutes and a total trip time of about 7 hours and 45 minutes, considering the layover.

Travelers can opt to enhance their journey from Seattle to Washington with upgraded flight options. Major airlines include Delta, offering first-class and premium economy cabins; Alaska Airlines, featuring first-class and business class; and United, which also provides first-class service.

Best time to fly from Seattle (SEA) to Washington (DCA)

The most popular months for travelers flying from Seattle to Washington are March, April, and August, when peak temperatures in Washington reach up to 77.4°F in August. If you prefer quieter travel, consider September, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 71.1°F. For better deals, May usually offers the lowest average one-way fare around $262. Flight availability peaks in August, with approximately 40 flights per week, making it easier to find convenient departure times. February has the fewest flights, with approximately 27 flights per week.

  • Cheapest time to fly: May usually offers good deals with average one-way fare around $262, roughly 7% cheaper than the yearly average.
  • More budget-friendly months to fly: January, February, and August typically offer average one-way fares of around $266.
  • Most flight options: August has the highest number of flights from Seattle to Washington, with approximately 40 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January35.1°F (1.7°C)Average30$263
February38.3°F (3.5°C)Average27$265
March45.7°F (7.6°C)Moderately High31$290
April56.3°F (13.5°C)Moderately High31$280
May65.7°F (18.7°C)Average32$262
June74.3°F (23.5°C)Average34$288
July79.5°F (26.4°C)Average35$286
August77.4°F (25.2°C)Moderately High40$269
September71.1°F (21.7°C)Moderately Low31$283
October59.9°F (15.5°C)Moderately Low29$316
November47.8°F (8.8°C)Moderately Low29$286
December40.6°F (4.8°C)Average28$307

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Seattle (SEA) to Washington (DCA)

  • Seattle to Washington (SEA-IAD): Located approximately 23 miles from Ronald Reagan Washington National Airport (DCA), Washington Dulles International Airport (IAD) offers a range of one-way economy fares from about $120 to $470, influenced by the season and when you make your reservation. Travelers can choose between non-stop and one-stop flights on this route. Major airlines providing service include Alaska Airlines and United. Additionally, options for business and first class are available for this journey.

How to find the best prices for flights from Seattle (SEA) to Washington (DCA)

Getting some of the best deals on flights from Seattle to Washington is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Evening flights (6pm-12am) often offer lower prices, while morning flights (5am-12pm) are the most popular. Additionally, flying on Thursdays provides both better prices and increased demand among travelers.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Ronald Reagan Washington National Airport from Seattle - Tacoma International Airport

Washington welcomes travelers from Seattle with a range of transport options based on price, convenience, and proximity. For departures, Seattle - Tacoma International Airport is roughly a 20-minute drive (covering about 14 miles) from central Seattle. Washington city center is approximately a 10-minute drive (covering about 5 miles) from Ronald Reagan Washington National Airport, depending on traffic. Here's how to reach Washington efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Washington, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Ronald Reagan Washington National Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Ronald Reagan Washington National Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Ronald Reagan Washington National Airport, National Airport Station, a metro station, is conveniently located just 0.2 miles away on foot, while Alexandria Station, a train station, is about 3.8 miles from the airport and typically accessed by car. Additionally, Washington Seaport, a seaport, is around 4.8 miles away, also reachable by car.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) cost?
You can find cheap one-way flights from $129 and cheap return flights from $246 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) with Expedia. One-way flights typically cost between $165 and $1062, and return flights often range between $338 and $1998. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
January is the cheapest month to fly from Seattle to Washington, DC, with average return fares around $298. This is about 30% lower than the average price throughout the year, as travel demand typically decreases after the holiday season. Other economical months to consider are February and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
Delta operates around 9 direct flights from SEA to DCA every week.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
Delta is one of the cheapest airlines offering nonstop flights from Seattle - Tacoma Intl. (SEA) to Ronald Reagan Washington National (DCA), with round-trip tickets starting from around $218. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
The best airline to fly with from Seattle, WA (SEA) to Washington, DC (DCA) will differ from traveler to traveler. If you like to fly early, Delta offers early morning flights. If price is the most important factor, Delta typically offers the lowest fares. American Airlines offers the most daily flights from Seattle to Washington, DC, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
For your journey from Seattle, WA (SEA) to Washington, DC (DCA), January and September are the best months to fly. January features return flights at around $298, making it a budget-friendly option, while September also offers favorable travel conditions. This information is derived from booking data over the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
On average, there are around 1 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to Ronald Reagan Washington National (DCA). For more options, look at flights that include layovers.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
The earliest flight from Seattle - Tacoma International (SEA) to Ronald Reagan Washington National (DCA) typically departs at around 12:05 AM, operated by American Airlines. This seasonal service is available in February and March, making it a great option for early travelers heading to Washington, DC. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
The most popular departure times for flights from Seattle (SEA) to Washington, DC (DCA) are in the early morning, from 6am to 9am. About 38% of passengers prefer this time window. Many major carriers, including American Airlines, Delta, and United Airlines, offer flights during this window. This timing is popular because it allows you to arrive in DC with a full day ahead of you.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
A nonstop flight from SEA to DCA typically takes around 5 hours, covering approximately 2,323 miles. Connecting flights on this route usually add 4 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
First class is available on flights from SEA to DCA. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines

How much is a business class flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
A direct, return business class ticket from Seattle, WA (SEA) to Washington, DC (DCA) typically costs between $2,173 - $4,292. A non-stop, one-way business class flight is usually around $1,068 - $1,448. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Seattle - Tacoma Intl. (SEA)?
From Seattle - Tacoma Intl. (SEA), you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA) in Washington. Some flights may connect through major hubs like Los Angeles Intl. (LAX), San Francisco Intl. (SFO), Denver Intl. (DEN) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) Washington Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Washington, DC (DCA-Ronald Reagan Washington National) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$246
Distance
2322 mi
Average flight time
8 hours 10 mins

Book with confidence

Seattle to Washington Flights

The cheapest times to fly from Seattle to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Washington are during the month of September. You can find some of the cheapest flights from Seattle to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Washington

Sunday is one of the best days to book for cheap flights from Seattle to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Washington in 2026. You can also book with separate airlines for your outbound and return journeys, from $129 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Washington Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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