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(OZ) Asiana Airlines 9521 On-Time Performance Rating

Date Range:

15-Jun-2026 to 15-Aug-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
51
82%
Late
3
5%
Very Late
3
5%
Excessive
3
5%
Cancelled
0
0%
Diverted
2
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
18
Codeshares
60
Average Delay (min.)
26.88888888888889
Standard Deviation
32
Min
0
Max
130

OZ 9521 On-Time Performance Details

Overall Rating
4.5 of 5
Good
Percentage On-Time 85%
Average Delay Time 26.88888888888889 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.5 shows that this flight has on-time performance characteristics better than 88% of all other flights in the FlightStats database.
On-Time Performance Rating
5.0 of 5
Very Good
Percentage On-Time 85%
This flight has an on-time performance of 85%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 99% of other flights.
Delay Performance
3.9 of 5
Good
Average Delay Time 26.88888888888889 min
This flight has an average delay of 26.88888888888889 minutes with a standard deviation of 32 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 79% of other flights.