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(WN) Southwest Airlines 1257 On-Time Performance Rating

Date Range:

01-Jan-2026 to 28-Feb-2026

(BOS) Boston Logan International Airport

Boston, MA, US

(DEN) Denver International Airport

Denver, CO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
8
73%
Late
2
18%
Very Late
0
0%
Excessive
1
9%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
11
Total Delays ( > 1 min )
7
Codeshares
0
Average Delay (min.)
43
Standard Deviation
79.5
Min
0
Max
223

WN 1257 On-Time Performance Details

Overall Rating
1.7 of 5
Average
Percentage On-Time 73%
Average Delay Time 43 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.7 shows that this flight has on-time performance characteristics better than 33% of all other flights in the FlightStats database.
On-Time Performance Rating
1.9 of 5
Average
Percentage On-Time 73%
This flight has an on-time performance of 73%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 38% of other flights.
Delay Performance
1.5 of 5
Poor
Average Delay Time 43 min
This flight has an average delay of 43 minutes with a standard deviation of 79.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 31% of other flights.

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