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(WN) Southwest Airlines 4134 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(ONT) Ontario International Airport

Ontario, CA, US

(MDW) Chicago Midway International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
28
85%
Late
0
0%
Very Late
1
3%
Excessive
3
9%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
32
Total Delays ( > 1 min )
7
Codeshares
0
Average Delay (min.)
37
Standard Deviation
38.1
Min
0
Max
110

WN 4134 On-Time Performance Details

Overall Rating
3.4 of 5
Average
Percentage On-Time 88%
Average Delay Time 37 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.4 shows that this flight has on-time performance characteristics better than 67% of all other flights in the FlightStats database.
On-Time Performance Rating
4.7 of 5
Very Good
Percentage On-Time 88%
This flight has an on-time performance of 88%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 93% of other flights.
Delay Performance
2.1 of 5
Average
Average Delay Time 37 min
This flight has an average delay of 37 minutes with a standard deviation of 38.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 42% of other flights.

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