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(UA) United Airlines 4521 On-Time Performance Rating

Date Range:

15-Nov-2025 to 15-Jan-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(AVL) Asheville Regional Airport

Asheville, NC, US

On-Time Performance Chart

(using rounded numbers)
On-Time
13
54%
Late
0
0%
Very Late
1
4%
Excessive
10
42%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
24
Total Delays ( > 1 min )
15
Codeshares
24
Average Delay (min.)
136.8
Standard Deviation
246.9
Min
0
Max
991

UA 4521 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 54%
Average Delay Time 136.8 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
0.1 of 5
Very Poor
Percentage On-Time 54%
This flight has an on-time performance of 54%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 136.8 min
This flight has an average delay of 136.8 minutes with a standard deviation of 246.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

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