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(WN) Southwest Airlines 991 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(BWI) Baltimore Washington International Airport

Baltimore, MD, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
40
78%
Late
1
2%
Very Late
3
6%
Excessive
6
12%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
50
Total Delays ( > 1 min )
26
Codeshares
0
Average Delay (min.)
37.15384615384615
Standard Deviation
63.2
Min
0
Max
243

WN 991 On-Time Performance Details

Overall Rating
3.0 of 5
Average
Percentage On-Time 80%
Average Delay Time 37.15384615384615 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3 shows that this flight has on-time performance characteristics better than 59% of all other flights in the FlightStats database.
On-Time Performance Rating
4.1 of 5
Good
Percentage On-Time 80%
This flight has an on-time performance of 80%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 82% of other flights.
Delay Performance
1.9 of 5
Average
Average Delay Time 37.15384615384615 min
This flight has an average delay of 37.15384615384615 minutes with a standard deviation of 63.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 38% of other flights.

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