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(WN) Southwest Airlines 3851 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

(ONT) Ontario International Airport

Ontario, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
6
29%
Late
8
38%
Very Late
3
14%
Excessive
4
19%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
21
Total Delays ( > 1 min )
17
Codeshares
0
Average Delay (min.)
37.1764705882353
Standard Deviation
34
Min
0
Max
155

WN 3851 On-Time Performance Details

Overall Rating
0.9 of 5
Poor
Percentage On-Time 29%
Average Delay Time 37.1764705882353 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.9 shows that this flight has on-time performance characteristics better than 16% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 29%
This flight has an on-time performance of 29%. 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
1.7 of 5
Average
Average Delay Time 37.1764705882353 min
This flight has an average delay of 37.1764705882353 minutes with a standard deviation of 34 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 34% of other flights.

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