(WN) Southwest Airlines 4378 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(PIT) Pittsburgh International Airport

Pittsburgh, PA, US

(BWI) Baltimore Washington International Airport

Baltimore, MD, US

On-Time Performance Chart

(using rounded numbers)

On-Time

73%

Late

Very Late

Excessive

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

15.875

Standard Deviation

18.3

Min

Max

WN 4378 On-Time Performance Details

Overall Rating

3.5 of 5

Average

Percentage On-Time 79%

Average Delay Time 15.875 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.5 shows that this flight has on-time performance characteristics better than 69% of all other flights in the FlightStats database.

On-Time Performance Rating

2.9 of 5

Average

Percentage On-Time 79%

This flight has an on-time performance of 79%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 58% of other flights.

Delay Performance

4.1 of 5

Good

Average Delay Time 15.875 min

This flight has an average delay of 15.875 minutes with a standard deviation of 18.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 82% of other flights.