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Cheap Flights from Washington D.C. (DCA) to Seattle (SEAA)

Compare Washington Ronald Reagan to Seattle flight deals

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Flight deals from Washington Ronald Reagan to Seattle

Looking for a cheap last-minute deal or the best return flight from Washington Ronald Reagan Airport to Seattle? If you want to travel next month, return fares start from $352. Find the lowest prices on one-way and return tickets right here.
Seattle.$352 per passenger.Departing Sun, 20 Sep, returning Sat, 26 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sun, 20 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 26 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $352, select.
Seattle.$352 per passenger.Departing Fri, 28 Aug, returning Fri, 4 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Fri, 28 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 4 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $352, select.
Seattle.$352 per passenger.Departing Mon, 10 Aug, returning Wed, 19 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Mon, 10 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 19 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $352, select.
Seattle.$352 per passenger.Departing Mon, 28 Sep, returning Fri, 2 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Mon, 28 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 2 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $352, select.
Seattle.$352 per passenger.Departing Sat, 10 Oct, returning Sun, 18 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sat, 10 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sun, 18 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $352, select.
Seattle.$410 per passenger.Departing Sun, 1 Nov, returning Mon, 16 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sun, 1 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 16 Nov, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $410, select.
Seattle.$427 per passenger.Departing Sat, 31 Oct, returning Tue, 3 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Sat, 31 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Tue, 3 Nov, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $427, select.
Seattle.$436 per passenger.Departing Tue, 25 Aug, returning Tue, 29 Sep.Return flight with Delta.Outbound direct flight with Delta departs from Washington Ronald Reagan on Tue, 25 Aug, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 29 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $436, select.
Seattle.$436 per passenger.Departing Wed, 2 Sep, returning Fri, 11 Sep.Return flight with Delta.Outbound direct flight with Delta departs from Washington Ronald Reagan on Wed, 2 Sep, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Fri, 11 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $436, select.
Seattle.$437 per passenger.Departing Tue, 25 Aug, returning Mon, 31 Aug.Return flight with Delta.Outbound direct flight with Delta departs from Washington Ronald Reagan on Tue, 25 Aug, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Mon, 31 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $437, select.
Seattle.$509 per passenger.Departing Sat, 19 Sep, returning Sat, 3 Oct.Return flight with Delta.Outbound direct flight with Delta departs from Washington Ronald Reagan on Sat, 19 Sep, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Sat, 3 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $509, select.
Seattle.$511 per passenger.Departing Fri, 31 Jul, returning Thu, 13 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Fri, 31 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Thu, 13 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $511, select.
Seattle.$528 per passenger.Departing Mon, 23 Nov, returning Sat, 5 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Washington Ronald Reagan on Mon, 23 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Sat, 5 Dec, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $528, select.
Seattle.$548 per passenger.Departing Tue, 28 Jul, returning Fri, 31 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Tue, 28 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 31 Jul, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $548, select.
Seattle.$550 per passenger.Departing Thu, 10 Dec, returning Mon, 14 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Washington Ronald Reagan on Thu, 10 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Mon, 14 Dec, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $550, select.
Seattle.$582 per passenger.Departing Sat, 14 Nov, returning Mon, 16 Nov.Return flight with Delta.Outbound direct flight with Delta departs from Washington Ronald Reagan on Sat, 14 Nov, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Mon, 16 Nov, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $582, select.

Find the cheapest month to fly from Washington Ronald Reagan to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Ronald Reagan to Seattle flights are currently cheapest in August.
Jul
from $548
Aug
from $352
Sep
from $352
Oct
from $352
Nov
from $410
Dec
from $550
Jan
from $668
Feb
from $668
Mar
from $668
Apr
from $668
May
from $670
Jun
from $669

Direct flights from Washington Ronald Reagan to Seattle

Alternative Washington Ronald Reagan to Seattle routes

Looking for the cheapest, fastest or easiest route from Washington Ronald Reagan to Seattle? You could fly into the following airports instead.

Seattle Lake Union SPB

2km from central Seattle
Closest
Search flights

Seattle Boeing Fld

11km from central Seattle
from $1,115
Search flights

Seattle / Tacoma International

20km from central Seattle
Cheapest
from $352
Search flights

Paine Field

33km from central Seattle
from $773
Search flights

Washington D.C. to Seattle: Flight information

The things to know before you go.
Cheapest flight found$352
Cheapest month to flyAugust
Average flight time5 hrs, 59 mins
Most popular airlineAlaska Airlines
Average flights per week31

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

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Washington Ronald Reagan to Seattle is $352. 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 59 minutes is the average flight time from Washington Ronald Reagan to Seattle.
Alaska Airlines, Japan Airlines and Delta fly direct from Washington Ronald Reagan to Seattle.
As of July 2026, there are 31 flights per week flying from Washington Ronald Reagan to Seattle.
The cheapest month to fly from Washington Ronald Reagan to Seattle is usually August.
If you're flying from Washington Ronald Reagan Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from $352.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Ronald Reagan Airport to Seattle on Monday, 10 August 2026.
Yes – the average flight time is 5 hours and 59 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 Seattle 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 Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

In July, the average temperature is usually around 17°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, Frontier Airlines and Delta offer the cheapest flight tickets to Seattle.

Flying from Ronald Reagan Washington National Airport (DCA) to Seattle: what you need to know

  • Approximately 5 hours 10 minutes is how long you can expect to be travelling on a direct flight from Ronald Reagan Washington National Airport to Seattle.

  • The timezone in Seattle is UTC-8. The city is three hours behind Washington DC, where Ronald Reagan Washington National Airport is located.

  • The most popular route is from Ronald Reagan Washington National Airport (DCA) to Seattle-Tacoma International Airport (SEA). You can select from 19 weekly services between these two airports. If you want to head off as soon as possible, the earliest flight from DCA to SEA is the 08:00 Alaska Airlines option. If you're planning to fly out later on, the last departure is at 17:55 with Alaska Airlines.

  • Leave enough time to catch your DCA to Seattle flight. As a general rule, turn up at least two hours before international departures and an hour ahead for domestic flights.

  • Be prepared for longer queues during popular months such as July. Arriving up to four hours in advance for an international flight and two hours for domestic departures will help ensure a smooth travel experience.

  • Begin your trip at DCA and travel nonstop to Seattle-Tacoma International Airport (SEA). That's where you can expect to land when searching for Ronald Reagan Washington National Airport to Seattle tickets.

  • Keep an eye out for deals with Alaska Airlines. This carrier operates direct flights from Ronald Reagan Washington National Airport to Seattle.

  • DCA is about 6 kilometres from central Washington DC. If you're ride-sharing, driving or catching a taxi from the centre, it'll take 10 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the trip time to be around 25 minutes.

  • Want a relaxed start to your holiday? Stay near DCA. Whether you're boarding an early flight from Ronald Reagan Washington National Airport to Seattle or just don't want to be rushed, these hotels are just the thing:

  • When it comes to Ronald Reagan Washington National Airport's on-time performance, data shows 71% of flights complete their journey on time.

  • DCA's address is 1 Aviation Circle.

How to find the cheapest flights from Ronald Reagan Washington National Airport (DCA) to Seattle

  • $176 is the lowest price we've seen for a one-way Ronald Reagan Washington National Airport to Seattle flight. A return ticket right now is $352. Depending on when you want to go and the availability, these fares can change.

  • Score cheap flights from DCA to Seattle by booking three months ahead. Based on our research, that's the sweet spot for finding a bargain.

  • The best month for picking up cheap Ronald Reagan Washington National Airport to Seattle tickets is August. Use the 'Whole month' tool to compare flight prices, then select the dates with the lowest fares.

  • There's no need to check in daily to find out if fares have dropped when you create a Price Alert. We'll update you as soon as there's an even bigger deal on cheap flights from DCA to Seattle.

  • Find an affordable flight from Ronald Reagan Washington National Airport to Seattle with the help of our filters. Select your preferred times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) is around 23 kilometres from the centre of Seattle. If you're grabbing a taxi or a ride-share, the drive takes about 25 minutes.

  • It takes around 35 minutes if you're travelling on public transport.

  • If you're coming in on a late flight from Ronald Reagan Washington National Airport to Seattle, nothing beats the convenience of staying close to the terminal. Collect your bags from the carousel and then be showered and relaxing not long after at one of these hotels near SEA:

  • Lock in the best deal by reserving your vehicle from Seattle-Tacoma International Airport around one week in advance of your flight from DCA to Seattle.

Seattle Paine Field International Airport (PAE)

  • Seattle Paine Field International Airport (PAE) is roughly 40 kilometres from the centre of Seattle. Once you've disembarked your flight from Ronald Reagan Washington National Airport to Seattle, it'll take you around 40 minutes to reach the heart of the city in a ride-share or taxi.

  • If you travel by public transport, you'll reach the centre in 1 hour 30 minutes or so.

  • Following your DCA to Seattle flight, kick back at a hotel close to PAE. These are some great accommodation options that'll help you slip into relaxation mode:

  • Avoid filling out forms at the rental desk by having everything prearranged. Reserve your ride from PAE ahead of time so you can simply grab the keys and get going.

King County International Airport (BFI)

  • Make tracks for the city centre after your flight from Ronald Reagan Washington National Airport to Seattle has landed. Central Seattle is around 11 kilometres from King County International Airport (BFI) and takes roughly 20 minutes to reach by car.

  • Public transport can take you there in roughly 35 minutes.

  • If you don't want to make the trip to the centre, choose a hotel near BFI. Make yourself comfy at one of these options after your DCA to Seattle flight:

  • If you prefer a specific type of vehicle, booking early increases your chances of getting exactly what you want. Secure your ride from BFI at least a couple of weeks ahead of your flight from Ronald Reagan Washington National Airport to Seattle.

Best time to go to Seattle

  • July is the most popular month for flights from Ronald Reagan Washington National Airport to Seattle. To escape the crowds, head to Seattle in December.

  • When booking your Ronald Reagan Washington National Airport to Seattle plane ticket, think about the kind of weather you prefer. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • February has average temperatures of between -1ºC (30ºF) and 11ºC (52ºF). Search for a cheap ticket from DCA to Seattle around that time if you'd rather travel in cooler conditions.

More about Seattle

  • Once you've booked your flight from Ronald Reagan Washington National Airport to Seattle, choose a hotel that puts you where you want to be. Make one of these options your base for exploring Seattle:

  • Pike Place Market and Space Needle are a couple of major attractions to put on your Seattle to-do list. Continue your sightseeing adventures at Seattle Skyline.

Explore more of the United States

  • Portland is just one of the many places in the United States waiting to be explored after you've experienced Seattle. Around 241 kilometres away to the south, well-known attractions include Portland Japanese Garden, Peninsula Park Rose Garden and Beyond Van Gogh Portland.

  • If you're looking to explore another major stop in the United States, consider Spokane, about 370 kilometres east of Seattle. Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes are key highlights.

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Prices shown on this page are estimated lowest prices only. Found in the last 12 days.