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(DL) Delta Air Lines 399 On-Time Performance Rating

Date Range:

01-Nov-2025 to 31-Dec-2025

(BOS) Boston Logan International Airport

Boston, MA, US

(ATL) Atlanta Hartsfield-Jackson International Airport

Atlanta, GA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
36
75%
Late
4
8%
Very Late
2
4%
Excessive
5
10%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
48
Total Delays ( > 1 min )
15
Codeshares
0
Average Delay (min.)
52.266666666666666
Standard Deviation
73.4
Min
0
Max
300

DL 399 On-Time Performance Details

Overall Rating
1.7 of 5
Average
Percentage On-Time 75%
Average Delay Time 52.266666666666666 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.7 shows that this flight has on-time performance characteristics better than 32% of all other flights in the FlightStats database.
On-Time Performance Rating
2.7 of 5
Average
Percentage On-Time 75%
This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 54% of other flights.
Delay Performance
0.6 of 5
Poor
Average Delay Time 52.266666666666666 min
This flight has an average delay of 52.266666666666666 minutes with a standard deviation of 73.4 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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