(WN) Southwest Airlines 257 On-Time Performance Rating

Date Range:

01-Jun-2026 to 31-Jul-2026

(SAN) San Diego International Airport

San Diego, CA, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

69%

Late

31%

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.)

13.4375

Standard Deviation

5.7

Min

Max

WN 257 On-Time Performance Details

Overall Rating

3.1 of 5

Average

Percentage On-Time 69%

Average Delay Time 13.4375 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 61% of all other flights in the FlightStats database.

On-Time Performance Rating

1.5 of 5

Poor

Percentage On-Time 69%

This flight has an on-time performance of 69%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 31% of other flights.

Delay Performance

4.7 of 5

Very Good

Average Delay Time 13.4375 min

This flight has an average delay of 13.4375 minutes with a standard deviation of 5.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 95% of other flights.