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(DL) Delta Air Lines 821 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(ATL) Atlanta Hartsfield-Jackson International Airport

Atlanta, GA, US

(BOS) Boston Logan International Airport

Boston, MA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
42
70%
Late
6
10%
Very Late
2
3%
Excessive
8
13%
Cancelled
2
3%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
32
Codeshares
0
Average Delay (min.)
29.21875
Standard Deviation
34.6
Min
0
Max
150

DL 821 On-Time Performance Details

Overall Rating
1.9 of 5
Average
Percentage On-Time 70%
Average Delay Time 29.21875 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.9 shows that this flight has on-time performance characteristics better than 37% of all other flights in the FlightStats database.
On-Time Performance Rating
0.5 of 5
Very Poor
Percentage On-Time 70%
This flight has an on-time performance of 70%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 10% of other flights.
Delay Performance
3.3 of 5
Average
Average Delay Time 29.21875 min
This flight has an average delay of 29.21875 minutes with a standard deviation of 34.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 66% of other flights.