|January||Best time to beat the crowds with an average 26% drop in price.|
|July||Most popular time to fly with an average 20% increase in price.|
Average price of a round-trip
|$329||(avg. price over the last 2 weeks)|
Good deal for a round-trip
Alaska Airlines, United Airlines and Avianca have all waived their change and cancellation fees on flights from Washington Dulles Intl to Seattle/Tacoma Intl. Confirm policies on booking site.
Alaska Airlines and Delta do not allow booking a middle seat on flights from Washington Dulles Intl to Seattle/Tacoma Intl.
The United States has restricted the entry of all foreign nationals who have passed through or have been in China, Iran, European Schengen Area, UK, Ireland and Brazil in the past 14 days. Please see our Coronavirus (COVID-19) Travel Restrictions page for more information on restrictions worldwide.
An average nonstop flight takes 5h 40m, covering a distance of 2300 miles.
There are 151 (nonstop) flights between Washington Dulles Airport and Seattle/Tacoma Airport per week, averaging 21 per day.
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($229) and Delta ($281)
United Airlines (4 times daily), Avianca (2 times daily), Alaska Airlines (2 times daily) are the most frequent flyers on this route.
For Washington Dulles Airport to Seattle/Tacoma Airport, Tuesday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Seattle/Tacoma Airport back to Washington Dulles Airport, the best deals are generally found on Wednesday, with Tuesday being the most expensive.
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Seattle/Tacoma Airport.
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle/Tacoma Airport from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle/Tacoma Airport with an airline and back to Washington Dulles Airport with another airline.
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle/Tacoma Airport from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
Scores according to KAYAK customer reviews
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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.
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Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.
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