Cheap flights from Washington, D.C. Reagan-National Airport to Seattle from $89
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Seattle departing on 8/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Washington, D.C. Reagan-National Airport to Seattle
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
American Airlines flights from Washington, D.C. Reagan-National Airport to Seattle
Our best American Airlines deals on Washington, D.C. Reagan-National Airport to Seattle flight tickets
Alaska Airlines flights from Washington, D.C. Reagan-National Airport to Seattle
Our best Alaska Airlines deals on Washington, D.C. Reagan-National Airport to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
In general, May is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $417. If you don’t want to visit Seattle in May, then you should wait until January to fly from Washington, D.C. Reagan-National Airport, when ticket prices are also cheap, with an average price of $422.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Washington, D.C. Reagan-National Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $441. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Washington, D.C. Reagan-National Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $571.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Washington, D.C. Reagan-National Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $417 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $523. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Washington, D.C. Reagan-National to Seattle/Tacoma Intl flight route?
Fly from Washington, D.C. Reagan-National to Seattle/Tacoma Intl for the best Washington, D.C. Reagan-National - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Washington, D.C. Reagan-National Airport when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $467 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Washington, D.C. Reagan-National Airport for as low as $378 on momondo.
What cabin class options are available on Washington, D.C. Reagan-National to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Washington, D.C. Reagan-National to Seattle/Tacoma Intl?
American Airlines, Frontier, and Alaska Airlines are the most popular carriers operating from Washington, D.C. Reagan-National to Seattle/Tacoma Intl
What airlines fly to Seattle?
Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Seattle from Washington, D.C. Reagan-National Airport according to our data. Alaska Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Washington, D.C. Reagan-National Airport to Seattle on average per day?
8 flights are operational daily from Washington, D.C. Reagan-National Airport to Seattle as of June 2025. The most popular departure time for this route is 8:00AM, with 50% of flights per day taking off at noon.
How many flights depart from Washington, D.C. Reagan-National Airport to Seattle on average per week?
59 flights are operational weekly from Washington, D.C. Reagan-National Airport to Seattle as of June 2025. The most popular departure day for this route is Thu, with 17% of flights per week taking off on this day.
When to book flights from Washington, D.C. Reagan-National Airport to Seattle
Cheap Washington, D.C. Reagan-National Airport to Seattle (DCA to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Seattle
How far is Washington, D.C. Reagan-National to Seattle/Tacoma Intl by plane?
There are 2322.2 mi between Washington, D.C. Reagan-National and Seattle/Tacoma Intl. Typically, this will take 5h 45m by plane in normal conditions.
When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport?
As of June 2025, there are 7 operators available to choose from for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Washington, D.C. Reagan-National Airport to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. Reagan-National Airport to Seattle is Boeing 737-800 Passenger/BBJ2 (winglets), representing 28.33% of all bookings. The subsequent popular models are Boeing 737 MAX 9 at 18.25%, Boeing 737-900 Passenger/BBJ3 (winglets) at 13.79%, and Airbus A321neo at 13.29%.
What is the most popular airline from Washington, D.C. Reagan-National Airport to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. Reagan-National Airport to Seattle is Alaska Airlines (43% of total bookings). The next most popular airlines are Delta (17%), American Airlines (14%), and Frontier (12%).
Best airlines flying from Washington, D.C. Reagan-National Airport to Seattle
Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $136 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $168 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $241 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $282 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $291 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $306 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom $316 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Washington, D.C. Reagan-National Airport to Seattle
Across 7 Delta flights from Washington, D.C. Reagan-National Airport to Seattle this week, the average price was $432, with the best Delta deals starting from $241 round-trip. 7,946 users have rated Delta on momondo, with an average score of 8.0/10.
Alaska Airlines Flights From Washington, D.C. Reagan-National Airport to Seattle
The best Alaska Airlines deal for Washington, D.C. Reagan-National Airport to Seattle flight tickets found on momondo in the last 72 hours was $316, round-trip. It should be noted that an average Alaska Airlines flight deal for this route in this time was higher, at $549 round-trip. Alaska Airlines operates 5 flights out of Washington, D.C. Reagan-National Airport into Seattle in an average week, so prices vary by time and availability. 10,000 Alaska Airlines reviews by users on momondo have scored the airline at 8.0/10.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Seattle?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Seattle. momondo saves you time and could save you money on your trip.
Can I find flights from Washington, D.C. to Seattle with flexible booking policies on momondo?
Yes. All flights to Seattle from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Washington, D.C. to Seattle?
Once all potential Washington, D.C. to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Washington, D.C. to Seattle right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Washington, D.C. and alert you when they change.