(WN) Southwest Airlines 439 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(MDW) Chicago Midway International Airport

Chicago, IL, US

(DCA) Ronald Reagan Washington National Airport

Washington, DC, US

On-Time Performance Chart

(using rounded numbers)

On-Time

67%

Late

Very Late

17%

Excessive

Cancelled

17%

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

18.5

Standard Deviation

17.7

Min

Max

WN 439 On-Time Performance Details

Overall Rating

2.4 of 5

Average

Percentage On-Time 67%

Average Delay Time 18.5 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 47% of all other flights in the FlightStats database.

On-Time Performance Rating

1.5 of 5

Poor

Percentage On-Time 67%

This flight has an on-time performance of 67%. 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

3.3 of 5

Average

Average Delay Time 18.5 min

This flight has an average delay of 18.5 minutes with a standard deviation of 17.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 66% of other flights.