(WN) Southwest Airlines 377 On-Time Performance Rating

Date Range:

01-Jun-2026 to 31-Jul-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

40%

Late

20%

Very Late

20%

Excessive

20%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

Standard Deviation

Min

Max

WN 377 On-Time Performance Details

Overall Rating

1.5 of 5

Poor

Percentage On-Time 40%

Average Delay Time 38 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.5 shows that this flight has on-time performance characteristics better than 29% of all other flights in the FlightStats database.

On-Time Performance Rating

0.3 of 5

Very Poor

Percentage On-Time 40%

This flight has an on-time performance of 40%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 5% of other flights.

Delay Performance

2.7 of 5

Average

Average Delay Time 38 min

This flight has an average delay of 38 minutes with a standard deviation of 17 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 54% of other flights.