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(DL) Delta Air Lines 991 On-Time Performance Rating

Date Range:

01-Aug-2021 to 30-Sep-2021

(DEN) Denver International Airport

Denver, CO, US

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

On-Time Performance Chart

(using rounded numbers)
On-Time
48
79%
Late
5
8%
Very Late
2
3%
Excessive
2
3%
Cancelled
0
0%
Diverted
4
7%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
57
Total Delays ( > 1 min )
23
Codeshares
0
Average Delay (min.)
15
Standard Deviation
15.9
Min
0
Max
55

DL 991 On-Time Performance Details

Overall Rating
4.2 of 5
Good
Percentage On-Time 84%
Average Delay Time 15 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.2 shows that this flight has on-time performance characteristics better than 82% of all other flights in the FlightStats database.
On-Time Performance Rating
3.9 of 5
Good
Percentage On-Time 84%
This flight has an on-time performance of 84%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 79% of other flights.
Delay Performance
4.4 of 5
Good
Average Delay Time 15 min
This flight has an average delay of 15 minutes with a standard deviation of 15.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 88% of other flights.