Sun Country AirlinesSY
Flights SY8751 07:45 Su
live
Direct flights from Seattle (BFI) to Seattle (SEA): 2 nonstop departures observed each week across 2 airlines. The nonstop covers 9 km, an estimated 31 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Seattle. Updated 20 September 2026 at 12:22 UTC.
BFI
Seattle
tracking
SEA
Seattle
smooth · +13
9 km · ~0h 31m est.
Running clean · 2 airlines · 2x weekly · nonstop
82 / 100
route health from live BFI and SEA delay boards
Flight time~0h 31mestimated from route distance
Weekly departures2x2 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Sun Country AirlinesUnited 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 daysUnited AirlinesUA
Flights UA4208 15:00 Fr
Airports right now
live boardsnext sweep in 120s
How the Seattle to Seattle route actually runs
Pro Flight Search records official board updates for nonstop BFI 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 — Seattle (BFI) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/BFI-SEA
BFI to SEA questions
Is BFI–SEA running on time right now?
Smooth skies ahead. The arrival side at SEA is the weaker end, route health score 82/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from BFI to SEA?
Great-circle distance is 9 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 31–31 min gate-to-gate on this route.
How often does BFI–SEA fly?
2 carriers operate this route, around 2 flights a week between them. Compare carrier days and times in the airline list above.
What does the route health score measure?
A blend of departure-side delay at BFI and arrival-side delay at SEA, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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