(WN) Southwest Airlines 556 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(DEN) Denver International Airport

Denver, CO, US

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

On-Time Performance Chart

(using rounded numbers)

On-Time

60%

Late

40%

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.)

Standard Deviation

5.6

Min

Max

WN 556 On-Time Performance Details

Overall Rating

2.6 of 5

Average

Percentage On-Time 60%

Average Delay Time 15 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.6 shows that this flight has on-time performance characteristics better than 51% of all other flights in the FlightStats database.

On-Time Performance Rating

1.4 of 5

Poor

Percentage On-Time 60%

This flight has an on-time performance of 60%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 27% of other flights.

Delay Performance

3.8 of 5

Good

Average Delay Time 15 min

This flight has an average delay of 15 minutes with a standard deviation of 5.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 76% of other flights.