(WN) Southwest Airlines 991 On-Time Performance Rating

Date Range:

01-Jun-2026 to 31-Jul-2026

(BWI) Baltimore Washington International Airport

Baltimore, MD, US

(ONT) Ontario International Airport

Ontario, CA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

71%

Late

14%

Very Late

Excessive

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

19.8

Standard Deviation

14.8

Min

Max

WN 991 On-Time Performance Details

Overall Rating

3.1 of 5

Average

Percentage On-Time 71%

Average Delay Time 19.8 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.1 shows that this flight has on-time performance characteristics better than 60% of all other flights in the FlightStats database.

On-Time Performance Rating

2.3 of 5

Average

Percentage On-Time 71%

This flight has an on-time performance of 71%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 46% of other flights.

Delay Performance

3.8 of 5

Good

Average Delay Time 19.8 min

This flight has an average delay of 19.8 minutes with a standard deviation of 14.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 76% of other flights.