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(UA) United Airlines 4521 On-Time Performance Rating

Date Range:

15-Apr-2025 to 15-Jun-2025

(EWR) Newark Liberty International Airport

Newark, NJ, US

(BUF) Buffalo Niagara International Airport

Buffalo, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
21
55%
Late
2
5%
Very Late
3
8%
Excessive
7
18%
Cancelled
5
13%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
38
Total Delays ( > 1 min )
16
Codeshares
38
Average Delay (min.)
62.5625
Standard Deviation
97.6
Min
0
Max
412

UA 4521 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 55%
Average Delay Time 62.5625 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.1 shows that this flight has on-time performance characteristics better than 0% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 55%
This flight has an on-time performance of 55%. 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
0.1 of 5
Very Poor
Average Delay Time 62.5625 min
This flight has an average delay of 62.5625 minutes with a standard deviation of 97.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 1% of other flights.

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