Jin AirLJ38% on time
Flights LJ655 13:25 daily
live
Direct flights from Seoul (GMP) to Ulsan (USN): 14 nonstop departures observed each week across 2 airlines. 57% of the last 23 operated flights arrived within 15 minutes of schedule. The median arrival is 15 minutes late. No cancellations were recorded across the 23 tracked flights. The nonstop covers 316 km, an estimated 54 minutes in the air. Measured by Pro Flight Search from live flight boards at Seoul and Ulsan. Updated 22 September 2026 at 07:08 UTC.
GMP
Seoul
busy · +22
USN
Ulsan
tracking
316 km · ~0h 54m est.
Runs rough · 2 airlines · 14x weekly · nonstop
57% on time
of the last 23 operated GMP → USN flights arrived within 15 minutes
Median arrival delay is +15 min. 0 of 23 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+15 minacross the last 23 operated legs
Flight time~0h 54mestimated from route distance
Weekly departures14x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 23
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Jin Air대한항공
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 boardsnext sweep in 120s
How the Seoul to Ulsan route actually runs
Pro Flight Search records official board updates for nonstop GMP to USN 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 (GMP) to Ulsan (USN) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/GMP-USN
GMP to USN questions
Is GMP–USN running on time right now?
Mostly on schedule. The departure side at GMP is the weaker end, route health score 70/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on GMP–USN?
Operators schedule morning departures around 07:20 and evening departures around 18:55 from GMP. Earlier flights typically land before destination-airport delays accumulate later in the day; check the USN delay card to confirm conditions when you'd arrive.
How long is the flight from GMP to USN?
Great-circle distance is 316 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 52–57 min gate-to-gate on this route.
How often does GMP–USN 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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