Travelling from Washington Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA): what you need to know
A direct flight from Washington Dulles International Airport to Seattle-Tacoma International Airport takes on average 5 hours 49 minutes. The timezone in Seattle is UTC-7, so it's 3 hours behind Washington DC.
Flights from Washington Dulles International Airport to Seattle-Tacoma International Airport start at 07:00 — the earliest with Alaska Airlines. The last departure is the 23:43 service with Alaska Airlines. Overall, you can choose from 58 weekly services from IAD to SEA.
Planning to travel during a peak period like school or public holidays? Expect longer lines at security and check-in. To play it safe, arrive up to four hours before international flights and two hours ahead of domestic departures.
We make it a piece of cake to book a flight with a stopover. To look at the options for flights from Washington Dulles International Airport to Seattle-Tacoma International Airport, uncheck 'Direct flights only.' Then, choose a flight with a stop long enough to tour your chosen city. Popular stopovers between IAD and SEA are:
O'Hare International Airport
Detroit Metropolitan Wayne County Airport
Denver International Airport
How to find the cheapest flights from Washington Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA)
$178 is currently the best price for a one-way ticket from Washington Dulles International Airport to Seattle-Tacoma International Airport. A return flight starts from $400. These fares can change depending on demand.
To snag cheap flight tickets from IAD to SEA, book your journey 10 months ahead of the departure date.
June is the cheapest month for tickets from Washington Dulles International Airport to Seattle-Tacoma International Airport. If you prefer to fly during a different time of year, the 'Whole month' tool will show you the lowest prices for every month.
Sign into your online account or use the app to create a Price Alert. You'll be notified straight away if there's a better deal on this route. It's simple to do, and it'll save you time searching for cheap flight tickets from IAD to SEA every day.
Use filters to tailor your flights from Washington Dulles International Airport to Seattle-Tacoma International Airport. Select your ideal arrival and departure times, number of stops and airlines. Alternatively, sort your results by 'Cheapest' to see the best deals.
Handy information about Washington Dulles International Airport (IAD)
Located around 56 kilometres from the centre of Washington DC, Washington Dulles International Airport can be reached in approximately 51 minutes by car, depending on traffic. The ride by public transport takes roughly 3 hours and 26 minutes.
Have an early flight from Washington Dulles International Airport to Seattle-Tacoma International Airport? Avoid the last-minute rush to the terminal (and sneak in some extra precious sleep) by picking one of these stays near IAD:
Arriving at Seattle-Tacoma International Airport (SEA)
The last thing you need is a long journey to your hotel if you're landing late on a flight from Washington Dulles International Airport to Seattle-Tacoma International Airport. Reserve one of these accommodation options near SEA instead:
Getting from Seattle-Tacoma International Airport (SEA) to central Seattle
From Seattle-Tacoma International Airport, Seattle is approximately 23 kilometres away. It takes around 18 minutes to reach the centre driving.
If you're using public transport, expect a journey of roughly 54 minutes.
When to fly to Seattle-Tacoma International Airport (SEA)
July is the most popular month for flights from Washington Dulles International Airport to Seattle-Tacoma International Airport. To avoid the crowds, head to Seattle in May.
Before locking in your flight from Washington Dulles International Airport to Seattle-Tacoma International Airport, consider the kind of weather you enjoy. August is the warmest month in Seattle, with the temperature ranging from 12ºC to 28ºC.
Search for cheap flight tickets from IAD to SEA in February if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between -1ºC and 11ºC on average.
More about Seattle
As soon as you've locked in your flights from IAD to SEA, you'll want to find somewhere to stay in Seattle. Make one of these accommodation options your base for exploring this exciting city:
Picardo Farm P-Patch Community Garden and Elliott Bay Waterfront are a couple of big attractions to add to your Seattle travel itinerary. Keep the sightseeing going at LMN Architects.
Complete your Seattle trip with hotels and a car rental
You've locked in your cheap ticket to Seattle-Tacoma International Airport — now it's time to find a great stay, and maybe even a set of wheels. We've compared prices across hundreds of companies to bring you the top hotels and car rental deals in Seattle.
