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(WN) Southwest Airlines 4939 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(LGA) New York LaGuardia Airport

New York, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
23
88%
Late
1
4%
Very Late
0
0%
Excessive
1
4%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
26
Total Delays ( > 1 min )
8
Codeshares
0
Average Delay (min.)
12.5
Standard Deviation
18
Min
0
Max
53

WN 4939 On-Time Performance Details

Overall Rating
4.7 of 5
Very Good
Percentage On-Time 89%
Average Delay Time 12.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.7 shows that this flight has on-time performance characteristics better than 92% of all other flights in the FlightStats database.
On-Time Performance Rating
4.9 of 5
Very Good
Percentage On-Time 89%
This flight has an on-time performance of 89%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 98% of other flights.
Delay Performance
4.4 of 5
Good
Average Delay Time 12.5 min
This flight has an average delay of 12.5 minutes with a standard deviation of 18 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 88% of other flights.

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