Cheap flights from Seattle to Washington, D.C. 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 Seattle to Washington, D.C. departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from Seattle to Washington, D.C. Reagan-National Airport
Our best Frontier deals on Seattle to Washington, D.C. Reagan-National Airport flight tickets
Delta flights from Seattle to Washington, D.C. Reagan-National Airport
Our best Delta deals on Seattle to Washington, D.C. Reagan-National Airport flight tickets
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from Seattle to Washington, D.C. Reagan-National Airport
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 Washington, D.C. Reagan-National Airport?
The month of November is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Seattle, with most prices found around $412. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $417.
What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?
The cheapest day to depart from Seattle to Washington, D.C. Reagan-National Airport is on a Friday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Friday will often find tickets for as low as $468. Flights from Seattle to Washington, D.C. Reagan-National Airport on a Monday will generally be more expensive and average around $563. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?
Our data shows that the cheapest Seattle to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the afternoon. Our users have found flights to Washington, D.C. Reagan-National Airport in the afternoon for as low as $323. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is at noon when prices are around $505.
What is the cheapest Seattle/Tacoma Intl to Washington, D.C. Reagan-National flight route?
Fly from Seattle/Tacoma Intl to Washington, D.C. Reagan-National for the best Seattle/Tacoma Intl - Washington, D.C. Reagan-National flight prices
How far in advance should I book a flight to Washington, D.C. Reagan-National Airport?
You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Seattle when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $472 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Seattle for as low as $390 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Washington, D.C. Reagan-National flights?
There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Washington, D.C. Reagan-National flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Seattle to Washington, D.C. Reagan-National Airport flights?
You could potentially save up to 16% on your flight if you consider stops on a Seattle to Washington, D.C. Reagan-National Airport flight.
How have Seattle to Washington, D.C. Reagan-National Airport flight prices changed over time?
As of June 2025, prices for Seattle to Washington, D.C. Reagan-National Airport flights are approximately 36% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Washington, D.C. Reagan-National?
American Airlines, Frontier, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Washington, D.C. Reagan-National
What airlines fly to Washington, D.C. Reagan-National Airport?
Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Seattle according to our data. Alaska Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 7 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to Washington, D.C. Reagan-National Airport on average per day?
The number of flights available between Seattle and Washington, D.C. Reagan-National Airport is 9 per day as of June 2025. The most frequent departure time is 1:00PM, with 52% of daily flights leaving in the afternoon.
How many flights depart from Seattle to Washington, D.C. Reagan-National Airport on average per week?
As of June 2025, there are 63 flights per week flying from Seattle to Washington, D.C. Reagan-National Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.
When to book flights from Seattle to Washington, D.C. Reagan-National Airport
Cheap Seattle to Washington, D.C. Reagan-National Airport (SEA to DCA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Washington, D.C. Reagan-National Airport
How far is Seattle/Tacoma Intl to Washington, D.C. Reagan-National by plane?
A flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National will travel around 2322.2 mi. A reasonable flight in good conditions will take 5h 01m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport?
There are 7 operators available for flights from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Washington, D.C. Reagan-National Airport.
What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?
The necessary travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Washington, D.C. Reagan-National Airport?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Washington, D.C. Reagan-National Airport is Boeing 737-800 Passenger/BBJ2 (winglets), representing 28.02% of all bookings. The subsequent popular models are Boeing 737 MAX 9 at 18.51%, Airbus A321neo at 13.66%, and Boeing 737-900 Passenger/BBJ3 (winglets) at 13.25%.
What is the most popular airline from Seattle to Washington, D.C. Reagan-National Airport?
momondo data reveals that the most frequently booked airline on the route from Seattle to Washington, D.C. Reagan-National Airport is Alaska Airlines, representing 39% of all bookings. The subsequent popular airlines are Delta at 22%, American Airlines at 13%, and Frontier at 11%.
Best airlines flying from Seattle to Washington, D.C. Reagan-National Airport
Compare and see reviews for airlines that fly from Seattle to Washington, D.C. Reagan-National Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $128 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $143 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $264 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $275 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $296 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom $343 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Seattle to Washington, D.C. Reagan-National Airport
The lowest priced Delta flight from Seattle to Washington, D.C. Reagan-National Airport from the last 72 hours was $264. Generally, Delta has 7 flights on this route every week with an average price of $457. Delta is rated 8.0/10 by our users.
Alaska Airlines Flights From Seattle to Washington, D.C. Reagan-National Airport
Another popular option for Seattle to Washington, D.C. Reagan-National Airport flights is Alaska Airlines (8.0/10, 10,000 ratings). Alaska Airlines flies from Seattle to Washington, D.C. Reagan-National Airport around 14 times per week, with deals starting from $343 round-trip and rising to an average price of around $553.
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Why should I use momondo to find a flight deal from Seattle to Washington, D.C.?
It is quick and easy to find Seattle to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.
Can I find flights from Seattle to Washington, D.C. with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Seattle to Washington, D.C. flights to just show those with flexible booking policies.
How can momondo help me find flights from Seattle to Washington, D.C.?
momondo helps you find the best flight between Seattle and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to Washington, D.C. right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Seattle and alert you when they change.