Cathay PacificCX80% on time
Flights CX852 13:25 Mo Tu We Th Sa
live
Direct flights from Hong Kong (HKG) to Seattle (SEA): 5 nonstop departures observed each week across 1 airline. 80% of the last 5 operated flights arrived within 15 minutes of schedule. The median arrival is 3 minutes early. No cancellations were recorded across the 5 tracked flights. The nonstop covers 10,442 km, an estimated 13 hours 53 minutes in the air. Measured by Pro Flight Search from live flight boards at Hong Kong and Seattle. Updated 13 September 2026 at 02:55 UTC.
HKG
Hong Kong
smooth · +9
SEA
Seattle
busy · +23
10,442 km · ~13h 53m est.
Runs reliable · 1 airline · 5x weekly · nonstop
80% on time
of the last 5 operated HKG → SEA flights arrived within 15 minutes
Median arrival delay is −3 min. 0 of 5 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−3 minacross the last 5 operated legs
Flight time~13h 53mestimated from route distance
Weekly departures5x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Cathay Pacific
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 HKG: 41% odds of a 15+ minute delay and around +7 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 Hong Kong to Seattle route actually runs
Pro Flight Search records official board updates for nonstop HKG 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 — Hong Kong (HKG) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/HKG-SEA
HKG to SEA questions
Is HKG–SEA running on time right now?
Mostly on schedule. The arrival side at SEA is the weaker end, route health score 78/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from HKG to SEA?
Great-circle distance is 10,442 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 767–925 min gate-to-gate on this route.
How often does HKG–SEA fly?
Cathay Pacific runs the route with about 5 flights a week (mon, tue, wed, thu, sat). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at HKG 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.
.