background

(DL) Delta Air Lines 3999 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-2026

(SEA) Seattle-Tacoma International Airport

Seattle, WA, US

(SNA) John Wayne Airport

Santa Ana, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
28
82%
Late
1
3%
Very Late
2
6%
Excessive
2
6%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
33
Total Delays ( > 1 min )
13
Codeshares
33
Average Delay (min.)
26.76923076923077
Standard Deviation
38.1
Min
0
Max
144

DL 3999 On-Time Performance Details

Overall Rating
3.6 of 5
Good
Percentage On-Time 85%
Average Delay Time 26.76923076923077 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.6 shows that this flight has on-time performance characteristics better than 71% of all other flights in the FlightStats database.
On-Time Performance Rating
4.1 of 5
Good
Percentage On-Time 85%
This flight has an on-time performance of 85%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 82% of other flights.
Delay Performance
3.1 of 5
Average
Average Delay Time 26.76923076923077 min
This flight has an average delay of 26.76923076923077 minutes with a standard deviation of 38.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 62% of other flights.

Other Stops for DL 3999