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(WN) Southwest Airlines 377 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(MDW) Chicago Midway International Airport

Chicago, IL, US

(SLC) Salt Lake City International Airport

Salt Lake City, UT, US

On-Time Performance Chart

(using rounded numbers)
On-Time
14
58%
Late
5
21%
Very Late
2
8%
Excessive
2
8%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
24
Total Delays ( > 1 min )
16
Codeshares
0
Average Delay (min.)
21
Standard Deviation
18.4
Min
0
Max
57

WN 377 On-Time Performance Details

Overall Rating
2.1 of 5
Average
Percentage On-Time 58%
Average Delay Time 21 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.1 shows that this flight has on-time performance characteristics better than 41% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 58%
This flight has an on-time performance of 58%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 3% of other flights.
Delay Performance
4.1 of 5
Good
Average Delay Time 21 min
This flight has an average delay of 21 minutes with a standard deviation of 18.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 82% of other flights.

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