- Fastest outbound flight
- Fastest inbound flight
- non-stop flights
- 30x / week
- Flight distance
- 3,706 km
- Time difference
- Most popular airlines
- Alaska Airlines
- United Airlines
- Delta Air Lines
- Alaska Airlines
Flight schedule from Seattle-Tacoma (SEA) to Washington DC (IAD)
Select a travel date in the flight schedule for the route from Seattle-Tacoma (SEA) to Washington DC (IAD) and compare affordable flight deals.
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Matching outbound flights11 of 11
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durationstopovers
- September 6 – 12, 2026
- September 13 – 19, 2026
- September 20 – 26, 2026
- SEAIADnonstop
- SEAIADnonstop
- SEAIADnonstop
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- SEAIADnonstop
- SEAIADnonstop
- SEAIADnonstop
- SEAIADnonstop
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Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from Seattle-Tacoma to Washington DC?
A nonstop flight from Seattle-Tacoma to Washington DC typically takes around 4 hours 56 minutes. This makes the nonstop service the fastest and most convenient way to travel between Seattle-Tacoma and Washington DC. It is worth checking flight times when searching, as they can vary by airline and travel date.
Are there nonstop flights from Seattle-Tacoma to Washington DC?
Yes, there are nonstop flights from Seattle-Tacoma to Washington DC, averaging around 4 to 5 flights per day, operated by, among others, Alaska Airlines, United Airlines and Delta. If you want to fly without a layover, it is worth filtering specifically for nonstop flights when searching.
Which airlines fly from Seattle-Tacoma to Washington DC?
Direct flights from Seattle-Tacoma to Washington DC are operated by, among others, Alaska Airlines, United Airlines and Delta. These flights take you to Washington DC nonstop, making them especially practical for short trips or weekend getaways. It is still worth comparing departure times and airline policies, as baggage rules and fees can vary.
On which days are there nonstop flights from Seattle-Tacoma to Washington DC?
Nonstop flights from Seattle-Tacoma to Washington DC 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 Seattle-Tacoma to Washington DC?
On the route from Seattle-Tacoma to Washington DC, there are on average around 4 to 5 flights per day. The number of flights can vary by day of the week and season. If you are flexible with your dates, it is worth comparing several departure days.
How many flights per week are there from Seattle-Tacoma to Washington DC?
From Seattle-Tacoma to Washington DC, there are around 28 to 29 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 Seattle-Tacoma to Washington DC depart?
The earliest nonstop flight from Seattle-Tacoma to Washington DC usually departs at 8:00 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 Washington DC.
When does the last flight from Seattle-Tacoma to Washington DC depart?
The last nonstop flight from Seattle-Tacoma to Washington DC usually departs at 11:15 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.