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(CZ) China Southern Airlines 1638 On-Time Performance Rating

Date Range:

15-Apr-2026 to 15-Jun-2026

(SFO) San Francisco International Airport

San Francisco, CA, US

(CLT) Charlotte Douglas International Airport

Charlotte, NC, US

On-Time Performance Chart

(using rounded numbers)
On-Time
24
86%
Late
1
4%
Very Late
1
4%
Excessive
2
7%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
28
Total Delays ( > 1 min )
8
Codeshares
28
Average Delay (min.)
32
Standard Deviation
30.6
Min
0
Max
92

CZ 1638 On-Time Performance Details

Overall Rating
3.3 of 5
Average
Percentage On-Time 86%
Average Delay Time 32 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.3 shows that this flight has on-time performance characteristics better than 64% of all other flights in the FlightStats database.
On-Time Performance Rating
4.2 of 5
Good
Percentage On-Time 86%
This flight has an on-time performance of 86%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 84% of other flights.
Delay Performance
2.3 of 5
Average
Average Delay Time 32 min
This flight has an average delay of 32 minutes with a standard deviation of 30.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 46% of other flights.