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(UA) United Airlines 4521 On-Time Performance Rating

Date Range:

01-Sep-2025 to 31-Oct-2025

(EWR) Newark Liberty International Airport

Newark, NJ, US

(ORF) Norfolk International Airport

Norfolk, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
31
74%
Late
3
7%
Very Late
4
10%
Excessive
4
10%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
42
Total Delays ( > 1 min )
18
Codeshares
42
Average Delay (min.)
30.72222222222222
Standard Deviation
26.4
Min
0
Max
84

UA 4521 On-Time Performance Details

Overall Rating
1.9 of 5
Average
Percentage On-Time 74%
Average Delay Time 30.72222222222222 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.9 shows that this flight has on-time performance characteristics better than 36% of all other flights in the FlightStats database.
On-Time Performance Rating
1.4 of 5
Poor
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 27% of other flights.
Delay Performance
2.3 of 5
Average
Average Delay Time 30.72222222222222 min
This flight has an average delay of 30.72222222222222 minutes with a standard deviation of 26.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 46% of other flights.

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