(WN) Southwest Airlines 309 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(BNA) Nashville International Airport

Nashville, TN, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

75%

Late

25%

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.)

21.25

Standard Deviation

7.3

Min

Max

WN 309 On-Time Performance Details

Overall Rating

3.0 of 5

Average

Percentage On-Time 75%

Average Delay Time 21.25 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

2.5 of 5

Average

Percentage On-Time 75%

This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 50% of other flights.

Delay Performance

3.5 of 5

Average

Average Delay Time 21.25 min

This flight has an average delay of 21.25 minutes with a standard deviation of 7.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.