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(DL) Delta Air Lines 3979 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

(AZO) Kalamazoo - Battle Creek International Airport

Kalamazoo, MI, US

On-Time Performance Chart

(using rounded numbers)
On-Time
30
73%
Late
2
5%
Very Late
3
7%
Excessive
5
12%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
41
Total Delays ( > 1 min )
14
Codeshares
41
Average Delay (min.)
64.14285714285714
Standard Deviation
70.1
Min
0
Max
242

DL 3979 On-Time Performance Details

Overall Rating
1.4 of 5
Poor
Percentage On-Time 73%
Average Delay Time 64.14285714285714 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.4 shows that this flight has on-time performance characteristics better than 26% of all other flights in the FlightStats database.
On-Time Performance Rating
2.5 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 50% of other flights.
Delay Performance
0.2 of 5
Very Poor
Average Delay Time 64.14285714285714 min
This flight has an average delay of 64.14285714285714 minutes with a standard deviation of 70.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 4% of other flights.

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