Alaska AirlinesAS86% on time
live
Direct flights from Seattle (SEA) to Washington (DCA): 14 nonstop departures observed each week across 2 airlines. 91% of the last 11 operated flights arrived within 15 minutes of schedule. The median arrival is 27 minutes early. No cancellations were recorded across the 11 tracked flights. The nonstop covers 3,738 km, an estimated 5 hours 18 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Washington. Updated 17 September 2026 at 22:53 UTC.
SEA
Seattle
smooth · +4
DCA
Washington
smooth · +0
3,738 km · ~5h 18m est.
Runs reliable · 2 airlines · 14x weekly · nonstop
91% on time
of the last 11 operated SEA → DCA flights arrived within 15 minutes
Median arrival delay is −27 min. 0 of 11 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−27 minacross the last 11 operated legs
Flight time~5h 18mestimated from route distance
Weekly departures14x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 11
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesDelta Air Lines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysDelta Air LinesDL
Flights DL786 07:20 daily
History
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at DCA: 42% odds of a 15+ minute delay, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Seattle to Washington route actually runs
Pro Flight Search records official board updates for nonstop SEA to DCA flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Seattle (SEA) to Washington (DCA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-DCA
SEA to DCA questions
Is SEA–DCA running on time right now?
Smooth skies ahead. The departure side at SEA is the weaker end, route health score 96/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on SEA–DCA?
Operators schedule morning departures around 07:20 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the DCA delay card to confirm conditions when you'd arrive.
How long is the flight from SEA to DCA?
Great-circle distance is 3,738 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 294–350 min gate-to-gate on this route.
How often does SEA–DCA fly?
2 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.
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