Alaska AirlinesAS
Flights AS120 19:35 Mo We Th Fr Sa Su
live
Direct flights from Seoul (ICN) to Seattle (SEA): 24 nonstop departures observed each week across 4 airlines. 20% of the last 10 operated flights arrived within 15 minutes of schedule. The median arrival is 24 minutes late. No cancellations were recorded across the 10 tracked flights. The nonstop covers 8,374 km, an estimated 11 hours 14 minutes in the air. Measured by Pro Flight Search from live flight boards at Seoul and Seattle. Updated 11 September 2026 at 05:23 UTC.
ICN
Seoul
busy · +19
SEA
Seattle
heavy · +30
8,374 km · ~11h 14m est.
Runs rough · 4 airlines · 24x weekly · nonstop
20% on time
of the last 10 operated ICN → SEA flights arrived within 15 minutes
Median arrival delay is +24 min. 0 of 10 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+24 minacross the last 10 operated legs
Flight time~11h 14mestimated from route distance
Weekly departures24x4 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 10
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesAsiana AirlinesDelta Air LinesKOREAN 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 SEA: 27% odds of a 15+ minute delay and around +2 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 Seoul to Seattle route actually runs
Pro Flight Search records official board updates for nonstop ICN 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 — Seoul (ICN) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ICN-SEA
ICN to SEA questions
Is ICN–SEA running on time right now?
Some delays possible. The arrival side at SEA is the weaker end, route health score 67/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on ICN–SEA?
Operators schedule evening departures around 19:00 from ICN. 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 ICN to SEA?
Great-circle distance is 8,374 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 621–748 min gate-to-gate on this route.
How often does ICN–SEA fly?
4 carriers operate this route, around 24 flights a week between them. Compare carrier days and times in the airline list above.
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