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(WN) Southwest Airlines 4539 On-Time Performance Rating

Date Range:

01-Sep-2026 to 31-Oct-2026

(SAT) San Antonio International Airport

San Antonio, TX, US

(DAL) Dallas Love Field

Dallas, TX, US

On-Time Performance Chart

(using rounded numbers)
On-Time
21
81%
Late
3
12%
Very Late
1
4%
Excessive
0
0%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
26
Total Delays ( > 1 min )
15
Codeshares
0
Average Delay (min.)
10.733333333333333
Standard Deviation
10.7
Min
0
Max
42

WN 4539 On-Time Performance Details

Overall Rating
4.0 of 5
Good
Percentage On-Time 81%
Average Delay Time 10.733333333333333 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4 shows that this flight has on-time performance characteristics better than 78% of all other flights in the FlightStats database.
On-Time Performance Rating
3.3 of 5
Average
Percentage On-Time 81%
This flight has an on-time performance of 81%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 66% of other flights.
Delay Performance
4.6 of 5
Very Good
Average Delay Time 10.733333333333333 min
This flight has an average delay of 10.733333333333333 minutes with a standard deviation of 10.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 92% of other flights.

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