Hello. Let's Fly.

IAD to SEA (Washington to Seattle) Flights

Last Minute Flights from IAD to SEA

Flight deals found on Expedia within the last 12 hours

Cheapest IAD to SEA Flights

Best airfare and ticket deals for IAD to SEA flights are based on recent deals found by Expedia.com customers.

Cheap IAD to SEA Tickets Calendar

Lowest round trip prices customers recently found on Expedia

1. Choose a departure

2. Now choose a return date

Departure
Return

Current prices may differ due to duration or market changes

IAD to SEA Flight Details

Distance and aircraft type by airline for flights from Washington Dulles International Airport to Seattle-Tacoma International Airport.

Origin IAD Washington Dulles International Airport
Destination SEA Seattle-Tacoma International Airport
Distance 2,299.73 miles
Interesting Facts About Flights from Washington to Seattle (IAD to SEA)
What airlines fly direct from IAD airport to SEA airport?
Each month there are several airlines that offer direct flights from Washington (IAD) to Seattle (SEA). Among the top airlines that consistently provide IAD to SEA flights include:
  • Alaska Airlines - (AS) with 30 direct flights between Washington and Seattle monthly
  • Southwest Airlines - (WN) with 30 direct flights between IAD and SEA monthly
  • American Airlines - (AA) with 60 direct flights between Washington and Seattle monthly
  • Delta Air Lines - (DL) with 150 direct flights between IAD and SEA monthly
  • United Airlines - (UA) with 240 direct flights between Washington and Seattle monthly
How long does it take to fly from IAD to SEA?
The total flight duration time from Washington (IAD) to Seattle (SEA) is typically 9 hours 45 minutes. This is the average non-stop flight time based upon historical flights for this route. During this period travelers can expect to fly about 2,943 miles, or 4,737 kilometers.
How many flights are there from IAD to SEA per day?
With 5 different airlines operating flights between Washington and Seattle, there are, on average, 570 flights per month. This equates to about 133 flights per week, and 19 flights per day from IAD to SEA.
How many morning flights are there from IAD to SEA?
  • Southwest Airlines - (WN) lists, on average, 3 flights departing before 12:00pm, where the first departure from IAD is at 06:00AM and the last departure before noon is at 06:45AM
  • Delta Air Lines - (DL) has about 4 flights before noon, starting with the earliest at 06:10AM PST and the latest 11:04AM PST
  • United Airlines - (UA) lists, on average, 5 flights departing before 12:00pm, where the first departure from IAD is at 07:00AM and the last departure before noon is at 11:15AM
  • American Airlines - (AA) has about 1 flights before noon, starting with the earliest at 06:13AM PST and the latest 07:15AM PST
How many afternoon flights are available from Washington to Seattle?
  • Between 12pm PST and 6pm there are, on average, 1 direct flights provided by Alaska Airlines, where the earliest departing flight is at 03:23PM PST and the last departing flight is at 04:45PM PST.
  • Between 12pm PST and 6pm there are, on average, 1 direct flights provided by Delta Air Lines, where the earliest departing flight is at 01:00PM PST and the last departing flight is at 04:45PM PST.
  • Between 12pm PST and 6pm there are, on average, 3 direct flights provided by United Airlines, where the earliest departing flight is at 12:30PM PST and the last departing flight is at 05:45PM PST.
  • There are about 1 Southwest Airlines flights between 12pm PST and 6pm PST, beginning at 04:40PM PST and the last afternoon flight at 04:40PM PST.
  • There are about 1 American Airlines flights between 12pm PST and 6pm PST, beginning at 01:40PM PST and the last afternoon flight at 03:23PM PST.
What is the flight distance from Washington to Seattle?
The calculated straight line flying distance from IAD airport to SEA airport is 2,943 miles, or 4,737 kilometers.
What is the earliest departure time out of Washington to Seattle?
The earliest flight departs from IAD at 06:00AM and arrives at 01:50PM at SEA.
What is the latest flight available from IAD to SEA?
The latest departure time from IAD is scheduled at 05:45PM with an arrival time of 12:23AM at SEA.

Washington to Seattle Flight Schedule

Scan through flights from Washington Dulles International Airport (IAD) to Seattle-Tacoma International Airport (SEA) for the upcoming week. Sort the list by any column, and click on a dollar sign to see the latest prices available for each flight.

Flights.com only offers pricing for airlines that display a check fare on the days of the week each flight is available. A dot () indicates a flight is scheduled, but online booking is not currently available.

Washington to Seattle Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Washington to Seattle to attend your cousin’s wedding, to pitch a business idea to your boss, or perhaps simply to treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find the cheapest flights from IAD to SEA, we’ve got you covered here at Flights.com.

We present you with some of the hottest deals on airfare so stop that Google flights search. We want you to spend less on your flight from Washington to Seattle, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.

Frequently Traveled Flights from Washington, District of Columbia

Check out popular flights departing from Washington (IAD), and lock down the best airfare for your upcoming travel plans. Flights.com has researched and catalogued flights departing from Washington across many airlines, so quit waiting and book your trip with us!

Popular Flights from Seattle, Washington

Check out the best flights leaving from Seattle airport and secure the lowest fares for your upcoming travel plans. Flights.com makes it easy to find flights departing from Seattle (SEA) across many airlines, so stop waiting and book your trip with us!

Airlines

Check out popular airlines servicing Washington (IAD), and lock down the best fare for your upcoming travel plans. Flights.com makes it simple to find flights departing from Washington Dulles International Airport across many airlines, so quit waiting and book your trip with us!

Latest Blog Updates