Asiana has filed a daily schedule between Seoul Incheon (ICN) and Seattle (SEA) from December 17, 2026, increasing the route from five to seven flights per week.
The current published timetable for OZ272 shows the five-weekly service continuing through December 15, excluding Wednesdays and Saturdays. Daily operation then begins December 17 and remains scheduled through March 13, 2027. That is two days earlier than the December 19 date contained in the initial schedule record.
OZ272 is scheduled to leave ICN at 9 p.m. and reach Seattle at 1:55 p.m. local time after a 9-hour, 55-minute flight. The westbound return, OZ271, moves to daily operation from Seattle on December 18 because of the direction’s calendar-day difference.
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A daily Boeing 777 operation
Asiana has scheduled the Boeing 777-200ER on the 4,523-nautical-mile route. Boeing lists a range of up to 7,500 nautical miles for the type, leaving ample performance margin for the North Pacific sector while providing the passenger and belly capacity expected on a major hub-to-hub market.
Asiana’s current fleet page lists eight 777-200ERs. The airline publishes several layouts for the aircraft with 300, 301 or 302 seats, so the exact capacity depends on the assigned airframe. The type remains one of Asiana’s higher-capacity long-haul aircraft and is well suited to consolidating connecting traffic over ICN.
Moving to daily service eliminates the Wednesday and Saturday gaps in Asiana’s schedule. Beyond the 40% increase in weekly departures, that gives the airline a more consistent product for passengers connecting over Seoul, particularly on itineraries where a missed operating day can add substantial elapsed time.
More capacity in a competitive Seattle market
The additional flights enter a Seattle-Seoul market that has become more competitive. The Port of Seattle’s 2026 international route listing includes Asiana, Korean Air, Delta Air Lines and Alaska Airlines among the carriers serving the airport’s Asia-Pacific network.
Alaska opened Seattle-Seoul service in September 2025 and currently describes the route as a five-times-weekly, year-round operation. Its launch schedule used the Boeing 787-9, adding another nonstop operator to a market already served by the Korean carriers and Delta.
Asiana’s move restores widebody capacity on the two days previously left open in its weekly pattern. It also preserves a late-evening ICN departure, allowing the flight to collect connecting passengers from across the airline’s Asian network before arriving in Seattle early enough for onward Pacific Northwest and domestic connections.
The schedule lands on Asiana’s integration date
The timing makes this more than a straightforward frequency increase. Korean Air has confirmed that the integrated Korean Air is scheduled to launch on December 17, 2026—the same date the daily ICN-SEA timetable begins.
Asiana has separately said it will leave Star Alliance at 11:59 p.m. Korea time on December 16, with the airline’s status and customer benefits moving into Korean Air and SkyTeam from the integration date. FlyMag has covered how Asiana’s Star Alliance exit ends a major chapter in Korean aviation.
The OZ-coded schedule should therefore be read as a transitional filing. It establishes the planned frequency and aircraft allocation, but the flight numbers and branding may be revised as reservations and operating systems are migrated into Korean Air.
Bottom Line
The schedule points to a daily Seoul-Seattle operation from December 17, increasing service by two flights per week with the Boeing 777-200ER. The capacity plan is clear even if the Asiana identity attached to the filing is approaching its final day.
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