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(WN) Southwest Airlines 991 On-Time Performance Rating

Date Range:

01-Jul-2025 to 31-Aug-2025

(HOU) Houston Hobby Airport

Houston, TX, US

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
29
97%
Late
0
0%
Very Late
0
0%
Excessive
1
3%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
30
Total Delays ( > 1 min )
2
Codeshares
0
Average Delay (min.)
31
Standard Deviation
29.7
Min
0
Max
52

WN 991 On-Time Performance Details

Overall Rating
4.0 of 5
Good
Percentage On-Time 97%
Average Delay Time 31 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
5.0 of 5
Very Good
Percentage On-Time 97%
This flight has an on-time performance of 97%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 100% of other flights.
Delay Performance
2.9 of 5
Average
Average Delay Time 31 min
This flight has an average delay of 31 minutes with a standard deviation of 29.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 58% of other flights.

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