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(WN) Southwest Airlines 3521 On-Time Performance Rating

Date Range:

01-Sep-2026 to 31-Oct-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(ECP) Northwest Florida Beaches International Airport

Panama City, FL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
5
42%
Late
1
8%
Very Late
1
8%
Excessive
5
42%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
12
Total Delays ( > 1 min )
11
Codeshares
0
Average Delay (min.)
59.90909090909091
Standard Deviation
61.3
Min
0
Max
175

WN 3521 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 42%
Average Delay Time 59.90909090909091 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.1 shows that this flight has on-time performance characteristics better than 1% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 42%
This flight has an on-time performance of 42%. 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
0.2 of 5
Very Poor
Average Delay Time 59.90909090909091 min
This flight has an average delay of 59.90909090909091 minutes with a standard deviation of 61.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 4% of other flights.

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