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(WN) Southwest Airlines 3521 On-Time Performance Rating

Date Range:

01-Sep-2026 to 31-Oct-2026

(PIT) Pittsburgh International Airport

Pittsburgh, PA, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
9
50%
Late
2
11%
Very Late
2
11%
Excessive
5
28%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
18
Total Delays ( > 1 min )
13
Codeshares
0
Average Delay (min.)
44.15384615384615
Standard Deviation
39.5
Min
0
Max
125

WN 3521 On-Time Performance Details

Overall Rating
0.5 of 5
Very Poor
Percentage On-Time 50%
Average Delay Time 44.15384615384615 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.5 shows that this flight has on-time performance characteristics better than 8% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very 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 0% of other flights.
Delay Performance
0.9 of 5
Poor
Average Delay Time 44.15384615384615 min
This flight has an average delay of 44.15384615384615 minutes with a standard deviation of 39.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 18% of other flights.

Other Stops for WN 3521