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(DL) Delta Air Lines 3999 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

(PIT) Pittsburgh International Airport

Pittsburgh, PA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
22
79%
Late
0
0%
Very Late
2
7%
Excessive
4
14%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
28
Total Delays ( > 1 min )
13
Codeshares
28
Average Delay (min.)
36.23076923076923
Standard Deviation
37.7
Min
0
Max
107

DL 3999 On-Time Performance Details

Overall Rating
2.0 of 5
Average
Percentage On-Time 79%
Average Delay Time 36.23076923076923 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2 shows that this flight has on-time performance characteristics better than 39% of all other flights in the FlightStats database.
On-Time Performance Rating
2.3 of 5
Average
Percentage On-Time 79%
This flight has an on-time performance of 79%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 46% of other flights.
Delay Performance
1.7 of 5
Average
Average Delay Time 36.23076923076923 min
This flight has an average delay of 36.23076923076923 minutes with a standard deviation of 37.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 34% of other flights.

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