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(UA) United Airlines 4520 On-Time Performance Rating

Date Range:

01-Sep-2025 to 31-Oct-2025

(IAD) Washington Dulles International Airport

Dulles, VA, US

(ROC) Frederick Douglass Greater Rochester Intl Airport

Rochester, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
24
77%
Late
2
6%
Very Late
0
0%
Excessive
4
13%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
30
Total Delays ( > 1 min )
12
Codeshares
30
Average Delay (min.)
41.166666666666664
Standard Deviation
46.7
Min
0
Max
131

UA 4520 On-Time Performance Details

Overall Rating
2.2 of 5
Average
Percentage On-Time 80%
Average Delay Time 41.166666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.2 shows that this flight has on-time performance characteristics better than 43% of all other flights in the FlightStats database.
On-Time Performance Rating
3.3 of 5
Average
Percentage On-Time 80%
This flight has an on-time performance of 80%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 66% of other flights.
Delay Performance
1.1 of 5
Poor
Average Delay Time 41.166666666666664 min
This flight has an average delay of 41.166666666666664 minutes with a standard deviation of 46.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 21% of other flights.

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