DCA → SEAWashington to Seattle

live

Direct flights from Washington (DCA) to Seattle (SEA): 21 nonstop departures observed each week across 2 airlines. No cancellations were recorded across the 21 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 5 November 2026 at 09:22 UTC.

Today, DCA → SEA

Thu 5 Nov · local times
  1. · AS1Alaska On schedule SEA 10:55scheduled
  2. · AS3Alaska On schedule SEA 20:13scheduled
  3. · DL786Delta Air Lines On schedule SEA est. 19:33sched 19:35

Checked DCA board 22:18 · SEA board 01:22

DCA Washington smooth · +10
SEA Seattle smooth · +0
3,738 km · ~5h 18m est.
dep bank 08:00–17:0021x weekly
Running clean · 2 airlines · 21x weekly · nonstop
93 / 100

route health from live DCA and SEA delay boards

0 of 21 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Flight time~5h 18mestimated from route distance
Weekly departures21x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 21

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 AirlinesAS

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

Delta Air LinesDL

Flights DL786 16:45 daily

History

operated legs · board outcomes
11-04AS1departed+13
11-04AS3departed+25
11-04DL786departed+9
11-03AS1departed+8
11-03AS3departed+27
11-03DL786departed+34
11-02AS1departed+37
11-02AS3departed+16
11-02DL786departed+9
11-01AS1departed+35
11-01AS3departed+25
11-01DL786departed+39
10-31AS1departed+16
10-31AS3departed+5
10-31DL786departed+8
10-30AS1departed+82
10-30AS3departed+14
10-30DL786departed+20
10-29AS1departed+19
10-29AS3departed+14
10-29DL786departed+2

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 +10 min smooth 🌤 overcast · S 8 kt Full DCA delay board →
SEASeattle +0 min smooth 🌤 scattered clouds · SSW 16 kt Full SEA delay board →

Weather lens

Conditions are tightest at DCA: a 34% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +3 min. Both figures come from the two airports' delay records in similar weather. 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?

Smooth skies ahead. The departure side at DCA is the weaker end, route health score 93/100. 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.