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

Date Range:

15-Jun-2025 to 15-Aug-2025

(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
19
46%
Late
5
12%
Very Late
3
7%
Excessive
14
34%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
41
Total Delays ( > 1 min )
27
Codeshares
0
Average Delay (min.)
52.333333333333336
Standard Deviation
43.6
Min
0
Max
177

DL 821 On-Time Performance Details

Overall Rating
0.3 of 5
Very Poor
Percentage On-Time 46%
Average Delay Time 52.333333333333336 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.3 shows that this flight has on-time performance characteristics better than 5% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 46%
This flight has an on-time performance of 46%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% 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 43.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 12% of other flights.