Flight Routes from Washington DC to Seattle Tacoma
Compare cheap outbound and return flights from Washington-DC (WAS) to Seattle-Tacoma (SEA)and find the best offer from numerous airlines and travel agencies.
Cheapest roundtrip flight
from€478
Fastest outbound flight
Fastest inbound flight
non-stop flights
111x / week
Flight distance
3,741 km
Time difference
Airports in Washington-DC
Dulles International Airport, DCIAD
Ronald Reagan National Airport, VADCA
Most popular airlines
Alaska Airlines
Delta Air Lines
United 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 flights22 of 22
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Aug 30 – Sep 5, 2026
September 6 – 12, 2026
September 13 – 19, 2026
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1 stopover
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IADSEA
nonstop
DCASEA
nonstop
IADSEA
nonstop
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DCASEA
1 stopover
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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 11 hours 53 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 16 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 United Airlines (via Houston - George Bush), Frontier Airlines (via Denver) and American Airlines (via Charlotte). 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 16 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 112 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 5:57 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.
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