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(WN) Southwest Airlines 851 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(BNA) Nashville International Airport

Nashville, TN, US

(DEN) Denver International Airport

Denver, CO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
13
57%
Late
3
13%
Very Late
1
4%
Excessive
6
26%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
23
Total Delays ( > 1 min )
19
Codeshares
0
Average Delay (min.)
36.89473684210526
Standard Deviation
45.2
Min
0
Max
164

WN 851 On-Time Performance Details

Overall Rating
1.0 of 5
Poor
Percentage On-Time 56%
Average Delay Time 36.89473684210526 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1 shows that this flight has on-time performance characteristics better than 19% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 56%
This flight has an on-time performance of 56%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
1.9 of 5
Average
Average Delay Time 36.89473684210526 min
This flight has an average delay of 36.89473684210526 minutes with a standard deviation of 45.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 38% of other flights.

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