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(WN) Southwest Airlines 399 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(DEN) Denver International Airport

Denver, CO, US

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

On-Time Performance Chart

(using rounded numbers)
On-Time
21
84%
Late
0
0%
Very Late
0
0%
Excessive
3
12%
Cancelled
0
0%
Diverted
1
4%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
25
Total Delays ( > 1 min )
4
Codeshares
0
Average Delay (min.)
69.25
Standard Deviation
50.3
Min
0
Max
126

WN 399 On-Time Performance Details

Overall Rating
2.6 of 5
Average
Percentage On-Time 84%
Average Delay Time 69.25 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.6 shows that this flight has on-time performance characteristics better than 50% of all other flights in the FlightStats database.
On-Time Performance Rating
4.5 of 5
Good
Percentage On-Time 84%
This flight has an on-time performance of 84%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 90% of other flights.
Delay Performance
0.6 of 5
Poor
Average Delay Time 69.25 min
This flight has an average delay of 69.25 minutes with a standard deviation of 50.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 12% of other flights.

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