(WN) Southwest Airlines 1156 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(MDW) Chicago Midway International Airport

Chicago, IL, US

(BUF) Buffalo Niagara International Airport

Buffalo, NY, US

On-Time Performance Chart

(using rounded numbers)

On-Time

86%

Late

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.)

14.461538461538462

Standard Deviation

14.3

Min

Max

WN 1156 On-Time Performance Details

Overall Rating

4.7 of 5

Very Good

Percentage On-Time 86%

Average Delay Time 14.461538461538462 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.7 shows that this flight has on-time performance characteristics better than 93% of all other flights in the FlightStats database.

On-Time Performance Rating

4.8 of 5

Very Good

Percentage On-Time 86%

This flight has an on-time performance of 86%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 96% of other flights.

Delay Performance

4.6 of 5

Very Good

Average Delay Time 14.461538461538462 min

This flight has an average delay of 14.461538461538462 minutes with a standard deviation of 14.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 92% of other flights.