CA $188 Cheap Flights from Washington (DCA) to Seattle (SEA)

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards

Cheap flights from Washington (DCA) to Seattle (SEA)

Prices were available within the past 7 days and start at CA $188 for one-way flights and CA $377 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Alaska Airlines
Delta
Delta
American Airlines
American Airlines
Delta
Alaska Airlines
Delta
JetBlue Airways

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

September is typically the cheapest month to fly

From CA $189 - CA $419 per traveller.

Graph displaying average flight prices per month

Flight from Washington to Seattle (DCA - SEA) route information
Origin airport
Ronald Reagan Washington National
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways
Roundtrip price
CA $377
Distance
3715 km
Average flight time
2 hours 56 mins

Washington to Seattle Flights

The easy way to book your flights from Washington to Seattle 

With Expedia, it’s simple to find and book flights to Seattle from Washington whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are JAL, Alaska Airlines, Delta Air Lines, Hawaiian Airlines, Korean Air, Air Tahiti Nui nonstop flights to Seattle - Tacoma Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Washington to Seattle today, tomorrow, or this week.  

 

Save dollars with cheap flights from Ronald Reagan Washington National, DCA to Seattle - Tacoma Intl., SEA 

Sort your search results by price to find great deals on your flight from Washington to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Washington currently is just CA $377 rising to CA $711.  

Here are more money-saving tips: 

  • Fly in October when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Seattle  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Seattle from Washington 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today.

Frequently asked questions

How much is a flight from National Airport to Sea-Tac Airport?
Start packing your suitcase, because round-trip journeys from Ronald Reagan Washington National Airport (DCA) to Sea-Tac Airport start from CA $377. That's based on airfares available within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book now to get the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from DCA to Sea-Tac Airport?
When it comes to cancellation fees, every airline has different terms and conditions. If you decide to cancel your getaway, visit our Customer Service Portal.
How do I find cheap flights from DCA to Sea-Tac Airport that have flexible change policies?
Flights from National Airport to Sea-Tac Airport offering flexible change policies are available with many carriers. Simply use our "No change fees" filter while searching. You'll only need to cover the cost difference between the two flights, without any additional fees to worry about.
How many hours is the flight from Ronald Reagan Washington National Airport (DCA) to Sea-Tac Airport?
Lasting around 7 hours and 51 minutes, the flight between DCA and Sea-Tac Airport is a good opportunity to do some last-minute planning. Why not use the time to go over your itinerary for SeaTac?
How far is the flight from DCA to SEA?
The flight distance from Arlington to SeaTac is 3,700 kilometres. Bring along a drink, some snacks and a good movie. Keep yourself occupied and the hours will zip by.
Which airlines fly direct from National Airport to Sea-Tac Airport?
Offering 60 flights each month, Alaska Airlines (AS) is a top choice when flying straight from Ronald Reagan Washington National Airport (DCA) to Sea-Tac Airport.
Are DCA to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices always go up and down, so there are no guarantees. While last-minute flight deals between National Airport and Seattle - Tacoma Intl. Airport (SEA) are of course possible, it's also a good idea to monitor prices well before you fly. In fact, some carriers announce their prices up to a year ahead of the departure date. Expedia is continuously updating the biggest bargains around, so check back often and be ready to secure your seat when the price dips.

Explore a world of travel with Expedia

Seattle nearby Airports

Seattle Paine Field Intl. Airport

Washington nearby Airports
*Available to Expedia members.