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(DL) Delta Air Lines 1399 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-2026

(BOS) Boston Logan International Airport

Boston, MA, US

(MIA) Miami International Airport

Miami, FL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
50
82%
Late
2
3%
Very Late
1
2%
Excessive
7
11%
Cancelled
1
2%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
17
Codeshares
0
Average Delay (min.)
63.94117647058823
Standard Deviation
88.5
Min
0
Max
335

DL 1399 On-Time Performance Details

Overall Rating
2.3 of 5
Average
Percentage On-Time 82%
Average Delay Time 63.94117647058823 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.3 shows that this flight has on-time performance characteristics better than 45% of all other flights in the FlightStats database.
On-Time Performance Rating
4.5 of 5
Good
Percentage On-Time 82%
This flight has an on-time performance of 82%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 90% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 63.94117647058823 min
This flight has an average delay of 63.94117647058823 minutes with a standard deviation of 88.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 3% of other flights.

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