Vuelos Desde A. Internacional Washington Dulles (IAD) a Seattle - Tacoma Intl. (SEA) Empezando Desde $132

Sometimes, a vacation is all about the journey; sometimes the magic is in the destination. If you just want to get to Seattle fast, multiple airlines advertise direct flights from Washington Dulles Intl. Airport (IAD) to SEA, including Alaska Airlines and United Airlines.

With the flight from Dulles Intl. Airport to Sea-Tac Airport taking around 5 hours and 58 minutes, you’ll have time to get lots of things done in the air. Make the most of your trip by bringing that novel you always wanted to read, exploring the in-flight entertainment or having a decent nap. You might even find you’re able to squeeze in all three before the plane lands.

The flight distance from Washington Dulles Intl. Airport (IAD) to Sea-Tac Airport is 2,300 mi. Make sure to bring something to read or some Sudoku puzzles to make your journey fly by.

You can take your pick from a number of airlines advertising direct flights between Sterling and Seattle. Alaska Airlines (AS) is one of the most well-known. This carrier operates roughly 52 flights each month. You should also look up the deals on offer from United Airlines (UA). Another leading airline, it operates 30 flights every month on the Sterling to Seattle route. Compare the two airlines to walk away with the best fare.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.