(WN) Southwest Airlines 3866 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(SJC) San Jose Mineta International Airport

San Jose, CA, US

(GEG) Spokane International Airport

Spokane, WA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

71%

Late

21%

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.)

19.818181818181817

Standard Deviation

14.2

Min

Max

WN 3866 On-Time Performance Details

Overall Rating

2.8 of 5

Average

Percentage On-Time 71%

Average Delay Time 19.818181818181817 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8 shows that this flight has on-time performance characteristics better than 55% of all other flights in the FlightStats database.

On-Time Performance Rating

1.5 of 5

Poor

Percentage On-Time 71%

This flight has an on-time performance of 71%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 31% of other flights.

Delay Performance

4.1 of 5

Good

Average Delay Time 19.818181818181817 min

This flight has an average delay of 19.818181818181817 minutes with a standard deviation of 14.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 82% of other flights.