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$103 Cheap Flights from Washington (DCA) to Seattle (SEA)

View $103 flight on Tue, Sep 8, 2026Opens in a new window

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

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Cheap Flights from Washington to Seattle (DCA-SEA)

Prices were available within the past 7 days and start at $103 for one-way flights and $206 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Aug 22 - Sat, Aug 29
DCA
Washington
SEA
Seattle
$206 Roundtrip, just found
$206
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Aug 22 from Washington to Seattle, returning Sat, Aug 29, priced at $206 just found
Frontier Airlines
Wed, Oct 7 - Mon, Oct 12
DCA
Washington
SEA
Seattle
$216 Roundtrip, found 1 hour ago
$216
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Oct 7 from Washington to Seattle, returning Mon, Oct 12, priced at $216 found 1 hour ago
Frontier Airlines
Mon, Aug 31 - Wed, Sep 9
DCA
Washington
SEA
Seattle
$256 Roundtrip, just found
$256
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Aug 31 from Washington to Seattle, returning Wed, Sep 9, priced at $256 just found
Frontier Airlines
Mon, Sep 7 - Sun, Sep 13
DCA
Washington
SEA
Seattle
$261 Roundtrip, just found
$261
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Sep 7 from Washington to Seattle, returning Sun, Sep 13, priced at $261 just found
Frontier Airlines
Mon, Aug 31 - Sat, Sep 5
DCA
Washington
SEA
Seattle
$266 Roundtrip, found 1 hour ago
$266
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Aug 31 from Washington to Seattle, returning Sat, Sep 5, priced at $266 found 1 hour ago
Frontier Airlines
Sat, Sep 26 - Sun, Oct 4
DCA
Washington
SEA
Seattle
$266 Roundtrip, found 1 hour ago
$266
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, Sep 26 from Washington to Seattle, returning Sun, Oct 4, priced at $266 found 1 hour ago
Alaska Airlines
Tue, Sep 1 - Sat, Sep 5
DCA
Washington
SEA
Seattle
$285 Roundtrip, just found
$285
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Sep 1 from Washington to Seattle, returning Sat, Sep 5, priced at $285 just found
JetBlue Airways
Wed, Oct 21 - Fri, Oct 23
DCA
Washington
SEA
Seattle
$291 Roundtrip, found 2 days ago
$291
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Wed, Oct 21 from Washington to Seattle, returning Fri, Oct 23, priced at $291 found 2 days ago
Southwest Airlines
Sat, Oct 24 - Wed, Oct 28
DCA
Washington
SEA
Seattle
$296 Roundtrip, found 18 hours ago
$296
Roundtrip
found 18 hours ago
Select Southwest Airlines flight, departing Sat, Oct 24 from Washington to Seattle, returning Wed, Oct 28, priced at $296 found 18 hours ago
American Airlines
Mon, Aug 31 - Wed, Sep 9
DCA
Washington
SEA
Seattle
$305 Roundtrip, just found
$305
Roundtrip
just found
Select American Airlines flight, departing Mon, Aug 31 from Washington to Seattle, returning Wed, Sep 9, priced at $305 just found

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $422
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $422

Find the cheapest month to fly from Washington (DCA) to Seattle (SEA)

April is typically the cheapest month to fly

From $189 - $477 per traveler.

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

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

Travel from Washington (DCA) to Seattle (SEA) with a range of airlines offering various options on this domestic long-haul route. You can easily compare choices from full-service and low-cost carriers to select the itinerary that best aligns with your budget and schedule as you prepare to discover Seattle's renowned attractions and neighborhoods. Check out essential details for flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport.

  • Fastest flight duration: around 6 hours non-stop
  • Route distance: roughly 2,300 miles (3,700 km)
  • Flights per week: around 25+ 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 Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma International Airport (SEA)

According to recent traveler bookings, here are the top airlines favored for flights from Washington to Seattle, featuring both non-stop and one-stop options. Popular layover airports include Denver International Airport (DEN) with around a 2-hour stop, O'Hare International Airport (ORD) and Midway International Airport (MDW), both offering approximately 1 hour and 15 minutes of layover time. This allows you the flexibility to adjust your itinerary based on price, overall travel time, and cabin class preferences.

  • Alaska Airlines: This full-service airline provides both non-stop and one-stop options, with one-way fares generally ranging from $130 to $550. It represents about 36% of flight departures on this route, with non-stop flights taking around 6 hours.
  • Delta: Known for its full-service offerings, Delta features non-stop and one-stop flights, with one-way fares typically falling between $120 and $560. This airline accounts for roughly 26% of flights on this route, with a standard non-stop travel time of 6 hours.
  • American Airlines: As a full-service carrier, American Airlines provides one-stop service with one-way ticket prices usually between $130 and $505. It covers about 11% of departures on this route, with an in-flight duration of 7 hours and 15 minutes, leading to a total travel time of approximately 8 hours and 45 minutes, including layovers.
  • Frontier Airlines: A budget-friendly option, Frontier Airlines offers one-stop service with one-way fares typically ranging from $110 to $285. It makes up around 9% of departures on this route, featuring an in-flight time of 7 hours and 15 minutes and a total journey time of about 8 hours and 45 minutes, including layovers.
  • United: This full-service carrier provides both non-stop and one-stop flights, with one-way fares generally between $140 and $450. United accounts for approximately 9% of departures on this route, with a typical one-stop journey lasting 7 hours and 15 minutes in the air, totaling about 8 hours and 45 minutes for the entire trip.

Travelers flying from Washington to Seattle have the option to upgrade their flight. Delta provides first class and premium economy cabins, while Alaska Airlines features both first class and business class. American Airlines also offers first class and business class seatings for a more comfortable journey.

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

The most popular months for travelers flying from Washington to Seattle are April, July, and August, when peak temperatures in Seattle reach up to 67.5°F in August. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 61.3°F and typically the lowest average one-way fare (around $244). Flight availability peaks in July, with approximately 40 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 24 flights per week.

  • Cheapest time to fly: September usually offers good deals with average one-way fare around $244, roughly 11% cheaper than the yearly average.
  • More budget-friendly months to fly: February and August typically offer average one-way fares of around $252.
  • Most flight options: July has the highest number of flights from Washington to Seattle, 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
January40.3°F (4.6°C)Average24$270
February40.5°F (4.7°C)Average24$248
March43.9°F (6.6°C)Average27$291
April48.6°F (9.2°C)Moderately High26$286
May55.8°F (13.2°C)Average32$282
June61.0°F (16.1°C)Average37$271
July67.1°F (19.5°C)Moderately High40$276
August67.5°F (19.7°C)Moderately High36$255
September61.3°F (16.3°C)Moderately Low29$244
October52.7°F (11.5°C)Moderately Low25$287
November44.2°F (6.8°C)Moderately Low26$302
December39.2°F (4.0°C)Average28$288

*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 Washington (DCA) to Seattle (SEA)

  • Washington to Seattle (IAD-SEA): Located about 23 miles from Ronald Reagan Washington National Airport (DCA), Washington Dulles International Airport (IAD) serves as a key hub for flights to Seattle. One-way economy fares on this route generally vary from $120 to $450, influenced by the season and how far in advance you book your ticket. Travelers can find both non-stop and one-stop flight options, with major airlines like United and Alaska Airlines frequently operating this route. Business and first-class service is also offered for those seeking a premium experience.

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

Getting some of the best deals on flights from Washington to Seattle 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, coinciding with the time most travelers make their reservations. Evening departures between 6 p.m. and 12 a.m. tend to offer lower prices, although afternoon flights from 12 p.m. to 6 p.m. are more popular. Additionally, flying on Tuesday often results in cheaper fares, while Saturday remains the most popular travel day.
  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 Seattle - Tacoma International Airport from Ronald Reagan Washington National Airport

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

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Seattle, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Seattle - Tacoma International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Seattle - Tacoma International 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 Seattle - Tacoma International Airport, SeaTac/Airport Station, a metro station, is located about 0.3 miles away on foot, while Tukwila Station, a train station, is situated approximately 4.3 miles away by car, providing convenient transport options for travelers.

Frequently asked questions

How much does a flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from $103 and cheap return flights from $206 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) with Expedia. One-way flights typically cost between $143 and $1255, and return flights often range between $352 and $2585. 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
January is the cheapest month to fly from Washington, DC (DCA) to Seattle, WA (SEA), with average return fares around $352. This price is about 23% lower than the average throughout the year, as January typically sees a decline in travel demand after the holiday season. Other affordable months to consider are February and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
3 airlines operate nonstop service from DCA to SEA:

  • Delta operates around 10 direct flights from DCA to SEA every week
  • Hawaiian Airlines operates around 9 direct flights from DCA to SEA every week
  • Japan Airlines operates around 7 direct flights from DCA to SEA every week

What is the cheapest airline that flies from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Delta is one of the cheapest airlines offering nonstop flights from Washington, DC (DCA) to Seattle (SEA), with round-trip tickets starting from around $406. 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.), 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Washington, DC (DCA) to Seattle, WA (SEA) will differ from traveler to traveler. If you like to fly early, Alaska Airlines 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 DCA to SEA, 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best times to fly from Washington, DC (DCA) to Seattle, WA (SEA) are typically January and September. In January, you can find return flights for around $352, making it a budget-friendly option after the holiday rush. September also offers great value with similar pricing, and the weather is generally pleasant, making it a lovely time to visit Seattle.*Prices based on flights available on Expedia in the last year.
How many flights per day from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
On average, there are around 1 nonstop flights per day from Ronald Reagan Washington National (DCA) to Seattle - Tacoma Intl. (SEA). For more options, look at flights that include layovers.
What is the earliest flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Ronald Reagan Washington National Airport (DCA) to Seattle-Tacoma International Airport (SEA) usually departs at around 5:00 AM, operated by American Airlines. An early start like this can help you maximize your time in Seattle. 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Washington, DC (DCA) to Seattle, WA (SEA) are in the early morning, from 6am to 9am. About 34% of passengers prefer this time window. Many major carriers, including American Airlines, Delta Air Lines, and Alaska Airlines, offer flights during this period. This timing works well because it allows you to arrive in Seattle with a full day ahead of you.
How long does it take to fly from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from DCA to SEA typically takes around 6 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly first class between DCA and SEA. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How much is a business class flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A direct, return business class ticket from Washington, DC (DCA) to Seattle, WA (SEA) typically costs between $1,492 - $2,396. A non-stop, one-way business class flight is usually around $479 - $1,004. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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 Seattle from Ronald Reagan Washington National (DCA)?
If you're planning to travel to Seattle from Ronald Reagan Washington National (DCA), you can fly into Seattle - Tacoma Intl. (SEA) Some flights may connect through major hubs like O'Hare Intl. (ORD), Kansas City Intl. (MCI), Love Field (DAL) before reaching Seattle. 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) Seattle 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 Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Washington, DC (DCA-Ronald Reagan Washington National) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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
Ronald Reagan Washington National
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$206
Distance
2322 mi
Average flight time
5 hours 15 mins

Book with confidence

Washington to Seattle Flights

The cheapest times to fly from Washington to Seattle

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 Washington to Seattle are during the month of August. You can find some of the cheapest flights from Washington to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Seattle

Sunday is one of the best days to book for cheap flights from Washington to Seattle: 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 Washington to Seattle

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 Washington to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $103 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 Washington to Seattle 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 Washington to Seattle 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.

 

Washington to Seattle Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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