background

(WN) Southwest Airlines 3861 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
39
78%
Late
5
10%
Very Late
2
4%
Excessive
1
2%
Cancelled
3
6%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
50
Total Delays ( > 1 min )
19
Codeshares
0
Average Delay (min.)
13.842105263157896
Standard Deviation
13.4
Min
0
Max
45

WN 3861 On-Time Performance Details

Overall Rating
4.1 of 5
Good
Percentage On-Time 78%
Average Delay Time 13.842105263157896 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.1 shows that this flight has on-time performance characteristics better than 81% of all other flights in the FlightStats database.
On-Time Performance Rating
3.5 of 5
Average
Percentage On-Time 78%
This flight has an on-time performance of 78%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 69% of other flights.
Delay Performance
4.7 of 5
Very Good
Average Delay Time 13.842105263157896 min
This flight has an average delay of 13.842105263157896 minutes with a standard deviation of 13.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 95% of other flights.

Other Stops for WN 3861