(WN) Southwest Airlines 439 On-Time Performance Rating

Date Range:

01-Oct-2025 to 30-Nov-2025

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(MCI) Kansas City International Airport

Kansas City, MO, US

On-Time Performance Chart

(using rounded numbers)

On-Time

50%

Late

Very Late

Excessive

50%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

106

Standard Deviation

Min

Max

106

WN 439 On-Time Performance Details

Overall Rating

0.6 of 5

Poor

Percentage On-Time 50%

Average Delay Time 106 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.6 shows that this flight has on-time performance characteristics better than 10% of all other flights in the FlightStats database.

On-Time Performance Rating

0.8 of 5

Poor

Percentage On-Time 50%

This flight has an on-time performance of 50%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 16% of other flights.

Delay Performance

0.3 of 5

Very Poor

Average Delay Time 106 min

This flight has an average delay of 106 minutes with a standard deviation of 0 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 7% of other flights.