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(WN) Southwest Airlines 3891 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(BOS) Boston Logan International Airport

Boston, MA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
10
63%
Late
2
13%
Very Late
2
13%
Excessive
1
6%
Cancelled
0
0%
Diverted
1
6%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
15
Total Delays ( > 1 min )
10
Codeshares
0
Average Delay (min.)
32
Standard Deviation
49.5
Min
0
Max
169

WN 3891 On-Time Performance Details

Overall Rating
2.3 of 5
Average
Percentage On-Time 67%
Average Delay Time 32 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.3 shows that this flight has on-time performance characteristics better than 44% of all other flights in the FlightStats database.
On-Time Performance Rating
1.4 of 5
Poor
Percentage On-Time 67%
This flight has an on-time performance of 67%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 27% of other flights.
Delay Performance
3.1 of 5
Average
Average Delay Time 32 min
This flight has an average delay of 32 minutes with a standard deviation of 49.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 62% of other flights.

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