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(DL) Delta Air Lines 9477 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(BLQ) Bologna Guglielmo Marconi Airport

Bologna, IT

(AMS) Amsterdam Schiphol Airport

Amsterdam, NL

On-Time Performance Chart

(using rounded numbers)
On-Time
44
72%
Late
11
18%
Very Late
4
7%
Excessive
2
3%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
46
Codeshares
61
Average Delay (min.)
23.847826086956523
Standard Deviation
68.7
Min
0
Max
474

DL 9477 On-Time Performance Details

Overall Rating
2.6 of 5
Average
Percentage On-Time 72%
Average Delay Time 23.847826086956523 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.6 shows that this flight has on-time performance characteristics better than 50% of all other flights in the FlightStats database.
On-Time Performance Rating
0.9 of 5
Poor
Percentage On-Time 72%
This flight has an on-time performance of 72%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 18% of other flights.
Delay Performance
4.2 of 5
Good
Average Delay Time 23.847826086956523 min
This flight has an average delay of 23.847826086956523 minutes with a standard deviation of 68.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 84% of other flights.