DCA → SEAWashington to Seattle

live

Direct flights from Washington (DCA) to Seattle (SEA): 14 nonstop departures observed each week across 2 airlines. 57% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 14 minutes late. No cancellations were recorded across the 7 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 Washington and Seattle. Updated 18 September 2026 at 19:23 UTC.

DCA Washington busy · +28
SEA Seattle smooth · +5
3,738 km · ~5h 18m est.
dep bank 08:00–17:0014x weekly
Runs rough · 2 airlines · 14x weekly · nonstop
57% on time

of the last 7 operated DCA → SEA flights arrived within 15 minutes

Median arrival delay is +14 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+14 minacross the last 7 operated legs
Flight time~5h 18mestimated from route distance
Weekly departures14x2 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
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 days
Alaska AirlinesAS60% on time

Flights AS1 08:00 daily · AS3 17:00 daily

Delta Air LinesDL

Flights DL786 16:45 daily

History

operated legs · board outcomes
09-18AS1departed+38
09-17AS1departed+2
09-17AS3departed+13
09-17DL786departed+34
09-16AS1departed+14
09-16AS3departed+63
09-16DL786departed+13

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
DCAWashington +28 min busy 🌤 mostly cloudy · N 11 kt Full DCA delay board →
SEASeattle +5 min smooth ⛅ overcast · S 6 kt Full SEA delay board →

Weather lens

Current conditions put the pressure at DCA: 38% odds of a 15+ minute delay and around +12 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Washington to Seattle route actually runs

Pro Flight Search records official board updates for nonstop DCA to SEA 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 — Washington (DCA) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/DCA-SEA
How we measure this →

DCA to SEA questions

Is DCA–SEA running on time right now?

Mostly on schedule. The departure side at DCA is the weaker end, route health score 76/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on DCA–SEA?

Operators schedule morning departures around 08:00 and evening departures around 17:00 from DCA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SEA delay card to confirm conditions when you'd arrive.

How long is the flight from DCA to SEA?

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 DCA–SEA fly?

2 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.