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(CZ) China Southern Airlines 1637 On-Time Performance Rating

Date Range:

15-Jun-2025 to 15-Aug-2025

(PHL) Philadelphia International Airport

Philadelphia, PA, US

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
19
51%
Late
4
11%
Very Late
1
3%
Excessive
11
30%
Cancelled
0
0%
Diverted
2
5%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
35
Total Delays ( > 1 min )
22
Codeshares
35
Average Delay (min.)
64.95454545454545
Standard Deviation
67.3
Min
0
Max
240

CZ 1637 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 54%
Average Delay Time 64.95454545454545 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.1 shows that this flight has on-time performance characteristics better than 1% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 54%
This flight has an on-time performance of 54%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 2% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 64.95454545454545 min
This flight has an average delay of 64.95454545454545 minutes with a standard deviation of 67.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 2% of other flights.