USN → CJUUlsan to Jeju City

live

Direct flights from Ulsan (USN) to Jeju City (CJU): 21 nonstop departures observed each week across 2 airlines. 92% of the last 24 tracked flights arrived within 15 minutes of schedule. The median arrival is 4 minutes early. No cancellations were recorded across the 24 tracked flights. The nonstop covers 349 km, an estimated 57 minutes in the air. Measured by Pro Flight Search from live flight boards at Ulsan and Jeju City. Updated 4 November 2026 at 11:22 UTC.

Today, USN → CJU

Wed 4 Nov · local times
  1. · BX8157에어부산 Departed Landed 12:41 +21
  2. · BX8159에어부산 Departed Landed 19:00 −10
  3. · KE1595대한항공 Departed Landed 16:51 −4

Checked CJU board 20:22

USN Ulsan tracking
CJU Jeju City smooth · +1
349 km · ~0h 57m est.
dep bank 12:20–19:1021x weekly
Runs reliable · 2 airlines · 21x weekly · nonstop
92% on time

of the last 24 tracked USN → CJU flights arrived within 15 minutes

Median arrival delay is −4 min. 0 of 24 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−4 minacross the last 24 arrivals
Flight time~0h 57mestimated from route distance
Weekly departures21x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 24

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air Busan대한항공

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 days
Air BusanBX88% on time

Flights BX8157 12:20 daily · BX8159 19:10 daily

대한항공KE100% on time

Flights KE1595 16:55 daily

History

operated legs · board outcomes
11-04BX8157arrived+21
11-04BX8159arrived−10
11-04KE1595arrived−4
11-03BX8157arrived−2
11-03BX8159arrived−25
11-03KE1595arrived−4
11-02BX8157arrived−2
11-02BX8159arrived−12
11-02KE1595arrived+6
11-01BX8157arrived+0
11-01BX8159arrived−7
11-01KE1595arrived+9
10-31BX8157arrived+6
10-31BX8159arrived−27
10-31KE1595arrived−12
10-30BX8157arrived+22
10-30BX8159arrived−10
10-30KE1595arrived−4
10-29BX8157arrived−1
10-29BX8159arrived−13
10-29KE1595arrived−10
10-28BX8157arrived−3
10-28BX8159arrived−2
10-28KE1595arrived−6

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
USNUlsan tracking Full USN delay board →
CJUJeju City +1 min smooth Full CJU delay board →

How the Ulsan to Jeju City route actually runs

Pro Flight Search records official board updates for nonstop USN to CJU 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: Ulsan (USN) to Jeju City (CJU) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/USN-CJU
How we measure this →

USN to CJU questions

Is USN–CJU running on time right now?

Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from USN to CJU?

Great-circle distance is 349 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 55–60 min gate-to-gate on this route.

How often does USN–CJU fly?

2 carriers operate this route, around 21 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 USN and arrival-side delay at CJU, 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.