- Cheapest roundtrip flight
- from€446
- Fastest outbound flight
- Fastest inbound flight
- non-stop flights
- 100x / week
- Flight distance
- 3,741 km
- Time difference
- Airports in Washington-DC
- Dulles International Airport, DC
- Ronald Reagan National Airport, VA
- Most popular airlines
- Alaska Airlines
- Delta Air Lines
- United Airlines
- Alaska Airlines
Flight schedule from Washington-DC (WAS) to Seattle-Tacoma (SEA)
Select a travel date in the flight schedule for the route from Washington-DC (WAS) to Seattle-Tacoma (SEA) and compare affordable flight deals.
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Matching outbound flightsWAS–SEA · 23 of 23
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- September 20 – 26, 2026
- Sep 27 – Oct 3, 2026
- October 4 – 10, 2026
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Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from Washington-DC to Seattle-Tacoma?
A nonstop flight from Washington-DC to Seattle-Tacoma typically takes around 6 hours. If you choose a connecting flight, allow more travel time. Typical one-stop itineraries take around 9 hours 52 minutes. For the quickest trip, a nonstop flight is usually the most comfortable choice.
Are there nonstop flights from Washington-DC to Seattle-Tacoma?
Yes, there are nonstop flights from Washington-DC to Seattle-Tacoma, averaging around 14 to 15 flights per day, operated by, among others, Alaska Airlines, Delta and United Airlines. If you want to fly without a layover, it is worth filtering specifically for nonstop flights when searching.
Which airlines fly from Washington-DC to Seattle-Tacoma?
Direct flights from Washington-DC to Seattle-Tacoma are operated by, among others, Alaska Airlines, Delta and United Airlines. Connecting flights with one stop are also available, for example with Alaska Airlines (via San Diego). If travel time matters to you, a direct flight is usually the most convenient option. Connecting flights often give you more choice of departure times and airlines.
On which days are there nonstop flights from Washington-DC to Seattle-Tacoma?
Nonstop flights from Washington-DC to Seattle-Tacoma operate daily. The schedule may vary by season, so it is worth comparing several travel dates. If your preferred day does not have a nonstop flight, nearby departure days or short connecting flights may be a good alternative.
How many flights are there per day from Washington-DC to Seattle-Tacoma?
From Washington-DC to Seattle-Tacoma, there are on average around 14 to 15 flights per day. This usually means you have a good choice of departure times. If you are flexible, you can easily compare times, prices, and airlines.
How many flights per week are there from Washington-DC to Seattle-Tacoma?
From Washington-DC to Seattle-Tacoma, there are around 100 to 101 flights per week. This means you usually have connections available on several days and at various times. Beyond the price, it is worth comparing flight duration, airline, and any potential additional fees.
When does the first flight from Washington-DC to Seattle-Tacoma depart?
The earliest nonstop flight from Washington-DC to Seattle-Tacoma usually departs at 6:30 AM. The exact departure time may vary by day of the week and airline. Early flights are especially useful if you want to make the most of your arrival day in Seattle-Tacoma.
When does the last flight from Washington-DC to Seattle-Tacoma depart?
The last nonstop flight from Washington-DC to Seattle-Tacoma usually departs at 5:38 PM. Late flights can be convenient if you want to travel after work or in the evening. Do check whether it is a nonstop flight, as a connecting itinerary could push the arrival time significantly later.