(WN) Southwest Airlines 4639 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

(GEG) Spokane International Airport

Spokane, WA, US

On-Time Performance Chart

(using rounded numbers)

On-Time

90%

Late

10%

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.)

9.75

Standard Deviation

6.6

Min

Max

WN 4639 On-Time Performance Details

Overall Rating

4.1 of 5

Good

Percentage On-Time 90%

Average Delay Time 9.75 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.1 shows that this flight has on-time performance characteristics better than 80% of all other flights in the FlightStats database.

On-Time Performance Rating

4.2 of 5

Good

Percentage On-Time 90%

This flight has an on-time performance of 90%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 84% of other flights.

Delay Performance

3.9 of 5

Good

Average Delay Time 9.75 min

This flight has an average delay of 9.75 minutes with a standard deviation of 6.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 79% of other flights.