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(DL) Delta Air Lines 3971 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-2026

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

(IAD) Washington Dulles International Airport

Dulles, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
15
68%
Late
1
5%
Very Late
2
9%
Excessive
3
14%
Cancelled
1
5%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
22
Total Delays ( > 1 min )
7
Codeshares
22
Average Delay (min.)
54.714285714285715
Standard Deviation
44.5
Min
0
Max
139

DL 3971 On-Time Performance Details

Overall Rating
0.8 of 5
Poor
Percentage On-Time 68%
Average Delay Time 54.714285714285715 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.8 shows that this flight has on-time performance characteristics better than 15% of all other flights in the FlightStats database.
On-Time Performance Rating
0.8 of 5
Poor
Percentage On-Time 68%
This flight has an on-time performance of 68%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 16% of other flights.
Delay Performance
0.8 of 5
Poor
Average Delay Time 54.714285714285715 min
This flight has an average delay of 54.714285714285715 minutes with a standard deviation of 44.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 16% of other flights.

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