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(DL) Delta Air Lines 491 On-Time Performance Rating

Date Range:

01-Nov-2025 to 31-Dec-2025

(JFK) New York John F. Kennedy International Airport

New York, NY, US

(SEA) Seattle-Tacoma International Airport

Seattle, WA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
34
72%
Late
2
4%
Very Late
2
4%
Excessive
7
15%
Cancelled
1
2%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
46
Total Delays ( > 1 min )
24
Codeshares
0
Average Delay (min.)
42.583333333333336
Standard Deviation
54.9
Min
0
Max
188

DL 491 On-Time Performance Details

Overall Rating
1.7 of 5
Average
Percentage On-Time 74%
Average Delay Time 42.583333333333336 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 32% of all other flights in the FlightStats database.
On-Time Performance Rating
2.1 of 5
Average
Percentage On-Time 74%
This flight has an on-time performance of 74%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 42% of other flights.
Delay Performance
1.2 of 5
Poor
Average Delay Time 42.583333333333336 min
This flight has an average delay of 42.583333333333336 minutes with a standard deviation of 54.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 24% of other flights.

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