OZ521 Asiana Airlines - Flight Status

Which is the frequency of flight OZ521?
The flight OZ521 is scheduled to flight on daily basis.

Which is the distance of flight OZ521?
The distance between the two airports is 8864 kilometers.

Which is the flight time of flight OZ521?
The scheduled flight time gate to gate is: 14:30 hours.
The real flight time gate to gate on average is: 14:08 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Seoul: 2026-07-22 14:12:13
Current Time in London: 2026-07-22 06:12:13

The following airlines serves the same route between Seoul and London:

Korean Air
- Flight Number: KE907. (On Time performance: 73 - Average Delay: 8 minutes)

Virgin Atlantic
- Flight Number: VS209. (On Time performance: 87 - Average Delay: 7 minutes)

We have gathered data from recent months and present below an analysis of how timely the flights have been.

Delays analyzed by Weekday: We have gathered available data from last six months, spanning from January 21, 2026 to July 20, 2026. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.

Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from July 02, 2025 to June 30, 2026. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.