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(DL) Delta Air Lines 4921 On-Time Performance Rating

Date Range:

15-Jul-2025 to 15-Sep-2025

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

(TYS) Knoxville McGhee Tyson Airport

Knoxville, TN, US

On-Time Performance Chart

(using rounded numbers)
On-Time
11
65%
Late
1
6%
Very Late
3
18%
Excessive
1
6%
Cancelled
0
0%
Diverted
1
6%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
16
Total Delays ( > 1 min )
9
Codeshares
16
Average Delay (min.)
25.88888888888889
Standard Deviation
26.1
Min
0
Max
83

DL 4921 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 69%
Average Delay Time 25.88888888888889 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 46% of all other flights in the FlightStats database.
On-Time Performance Rating
1.4 of 5
Poor
Percentage On-Time 69%
This flight has an on-time performance of 69%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 27% of other flights.
Delay Performance
3.3 of 5
Average
Average Delay Time 25.88888888888889 min
This flight has an average delay of 25.88888888888889 minutes with a standard deviation of 26.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 66% of other flights.

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