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(DL) Delta Air Lines 1221 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(MKE) Milwaukee Mitchell International Airport

Milwaukee, WI, US

(ATL) Atlanta Hartsfield-Jackson International Airport

Atlanta, GA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
55
90%
Late
1
2%
Very Late
0
0%
Excessive
4
7%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
9
Codeshares
0
Average Delay (min.)
105.77777777777777
Standard Deviation
135.8
Min
0
Max
365

DL 1221 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 90%
Average Delay Time 105.77777777777777 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 49% of all other flights in the FlightStats database.
On-Time Performance Rating
5.0 of 5
Very Good
Percentage On-Time 90%
This flight has an on-time performance of 90%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 100% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 105.77777777777777 min
This flight has an average delay of 105.77777777777777 minutes with a standard deviation of 135.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.