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

Date Range:

15-Mar-2026 to 15-May-2026

(PIT) Pittsburgh International Airport

Pittsburgh, PA, US

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

On-Time Performance Chart

(using rounded numbers)
On-Time
22
79%
Late
1
4%
Very Late
0
0%
Excessive
5
18%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
28
Total Delays ( > 1 min )
9
Codeshares
28
Average Delay (min.)
52.333333333333336
Standard Deviation
40.7
Min
0
Max
104

DL 3999 On-Time Performance Details

Overall Rating
1.5 of 5
Poor
Percentage On-Time 79%
Average Delay Time 52.333333333333336 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.5 shows that this flight has on-time performance characteristics better than 28% 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
0.6 of 5
Poor
Average Delay Time 52.333333333333336 min
This flight has an average delay of 52.333333333333336 minutes with a standard deviation of 40.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 12% of other flights.

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