(WN) Southwest Airlines 255 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(DSM) Des Moines International Airport

Des Moines, IA, US

(DEN) Denver International Airport

Denver, CO, US

On-Time Performance Chart

(using rounded numbers)

On-Time

81%

Late

Very Late

Excessive

12%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

66.57142857142857

Standard Deviation

101.2

Min

Max

289

WN 255 On-Time Performance Details

Overall Rating

2.1 of 5

Average

Percentage On-Time 81%

Average Delay Time 66.57142857142857 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.1 shows that this flight has on-time performance characteristics better than 40% of all other flights in the FlightStats database.

On-Time Performance Rating

3.8 of 5

Good

Percentage On-Time 81%

This flight has an on-time performance of 81%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 76% of other flights.

Delay Performance

0.3 of 5

Very Poor

Average Delay Time 66.57142857142857 min

This flight has an average delay of 66.57142857142857 minutes with a standard deviation of 101.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 7% of other flights.