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(WN) Southwest Airlines 3878 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

On-Time Performance Chart

(using rounded numbers)
On-Time
15
41%
Late
4
11%
Very Late
4
11%
Excessive
13
35%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
36
Total Delays ( > 1 min )
29
Codeshares
0
Average Delay (min.)
51.06896551724138
Standard Deviation
56.1
Min
0
Max
250

WN 3878 On-Time Performance Details

Overall Rating
0.2 of 5
Very Poor
Percentage On-Time 42%
Average Delay Time 51.06896551724138 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.2 shows that this flight has on-time performance characteristics better than 3% 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
0.4 of 5
Very Poor
Average Delay Time 51.06896551724138 min
This flight has an average delay of 51.06896551724138 minutes with a standard deviation of 56.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 8% of other flights.

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