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(WN) Southwest Airlines 121 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(PHX) Phoenix Sky Harbor International Airport

Phoenix, AZ, US

(BOI) Boise Air Terminal

Boise, ID, US

On-Time Performance Chart

(using rounded numbers)
On-Time
4
67%
Late
0
0%
Very Late
2
33%
Excessive
0
0%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
6
Total Delays ( > 1 min )
4
Codeshares
0
Average Delay (min.)
20.5
Standard Deviation
21.9
Min
0
Max
40

WN 121 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 67%
Average Delay Time 20.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 49% of all other flights in the FlightStats database.
On-Time Performance Rating
1.5 of 5
Poor
Percentage On-Time 67%
This flight has an on-time performance of 67%. 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
3.5 of 5
Average
Average Delay Time 20.5 min
This flight has an average delay of 20.5 minutes with a standard deviation of 21.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.

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