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(DL) Delta Air Lines 9439 On-Time Performance Rating

Date Range:

01-Jun-2026 to 31-Jul-2026

(AMS) Amsterdam Schiphol Airport

Amsterdam, NL

(ZRH) Zurich Airport

Zurich, CH

On-Time Performance Chart

(using rounded numbers)
On-Time
14
39%
Late
8
22%
Very Late
5
14%
Excessive
6
17%
Cancelled
3
8%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
36
Total Delays ( > 1 min )
26
Codeshares
36
Average Delay (min.)
30.076923076923077
Standard Deviation
22.3
Min
0
Max
78

DL 9439 On-Time Performance Details

Overall Rating
1.8 of 5
Average
Percentage On-Time 39%
Average Delay Time 30.076923076923077 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.8 shows that this flight has on-time performance characteristics better than 35% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 39%
This flight has an on-time performance of 39%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.
Delay Performance
3.6 of 5
Good
Average Delay Time 30.076923076923077 min
This flight has an average delay of 30.076923076923077 minutes with a standard deviation of 22.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 73% of other flights.

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