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(WN) Southwest Airlines 991 On-Time Performance Rating

Date Range:

15-Apr-2026 to 15-Jun-2026

(LAX) Los Angeles International Airport

Los Angeles, CA, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
38
78%
Late
6
12%
Very Late
3
6%
Excessive
2
4%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
49
Total Delays ( > 1 min )
26
Codeshares
0
Average Delay (min.)
16.5
Standard Deviation
14.9
Min
0
Max
49

WN 991 On-Time Performance Details

Overall Rating
3.4 of 5
Average
Percentage On-Time 78%
Average Delay Time 16.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.4 shows that this flight has on-time performance characteristics better than 66% of all other flights in the FlightStats database.
On-Time Performance Rating
2.1 of 5
Average
Percentage On-Time 78%
This flight has an on-time performance of 78%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 42% of other flights.
Delay Performance
4.6 of 5
Very Good
Average Delay Time 16.5 min
This flight has an average delay of 16.5 minutes with a standard deviation of 14.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 92% of other flights.

Other Stops for WN 991