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(UA) United Airlines 509 On-Time Performance Rating

Date Range:

01-Nov-2025 to 31-Dec-2025

(FCO) Rome Leonardo da Vinci Fiumicino Airport

Rome, IT

(EWR) Newark Liberty International Airport

Newark, NJ, US

On-Time Performance Chart

(using rounded numbers)
On-Time
23
74%
Late
2
6%
Very Late
1
3%
Excessive
3
10%
Cancelled
2
6%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
31
Total Delays ( > 1 min )
12
Codeshares
0
Average Delay (min.)
33.5
Standard Deviation
39.1
Min
0
Max
114

UA 509 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 74%
Average Delay Time 33.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 49% of all other flights in the FlightStats database.
On-Time Performance Rating
2.3 of 5
Average
Percentage On-Time 74%
This flight has an on-time performance of 74%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 46% of other flights.
Delay Performance
2.7 of 5
Average
Average Delay Time 33.5 min
This flight has an average delay of 33.5 minutes with a standard deviation of 39.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 54% of other flights.

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