Alaska AirlinesAS80% on time
live
Direct flights from Baltimore (BWI) to Seattle (SEA): 14 nonstop departures observed each week across 2 airlines. 50% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 17 minutes late. No cancellations were recorded across the 8 tracked flights. The nonstop covers 3,748 km, an estimated 5 hours 18 minutes in the air. Measured by Pro Flight Search from live flight boards at Baltimore and Seattle. Updated 9 September 2026 at 21:22 UTC.
BWI
Baltimore
busy · +15
SEA
Seattle
smooth · +0
3,748 km · ~5h 18m est.
Runs rough · 2 airlines · 14x weekly · nonstop
50% on time
of the last 8 operated BWI → SEA flights arrived within 15 minutes
Median arrival delay is +17 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+17 minacross the last 8 operated legs
Flight time~5h 18mestimated from route distance
Weekly departures14x2 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesSouthwest Airlines
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 daysHistory
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 BWI and SEA: 37% odds of a 15+ minute delay and around +6 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Baltimore to Seattle route actually runs
Pro Flight Search records official board updates for nonstop BWI 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 — Baltimore (BWI) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/BWI-SEA
BWI to SEA questions
Is BWI–SEA running on time right now?
Smooth skies ahead. The departure side at BWI is the weaker end, route health score 90/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on BWI–SEA?
Operators schedule morning departures around 07:50 and evening departures around 19:15 from BWI. 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 BWI to SEA?
Great-circle distance is 3,748 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 295–351 min gate-to-gate on this route.
How often does BWI–SEA 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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