background

(DL) Delta Air Lines 509 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(DTW) Detroit Metropolitan Wayne County Airport

Detroit, MI, US

(SFO) San Francisco International Airport

San Francisco, CA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
37
65%
Late
9
16%
Very Late
3
5%
Excessive
8
14%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
57
Total Delays ( > 1 min )
32
Codeshares
0
Average Delay (min.)
74.3125
Standard Deviation
181.2
Min
0
Max
737

DL 509 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 65%
Average Delay Time 74.3125 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.1 shows that this flight has on-time performance characteristics better than 0% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 65%
This flight has an on-time performance of 65%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 2% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 74.3125 min
This flight has an average delay of 74.3125 minutes with a standard deviation of 181.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.