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(UA) United Airlines 4521 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-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
10
32%
Late
7
23%
Very Late
1
3%
Excessive
5
16%
Cancelled
5
16%
Diverted
3
10%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
28
Total Delays ( > 1 min )
15
Codeshares
28
Average Delay (min.)
102.86666666666666
Standard Deviation
250
Min
0
Max
991

UA 4521 On-Time Performance Details

Overall Rating
0.0 of 5
Very Poor
Percentage On-Time 36%
Average Delay Time 102.86666666666666 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0 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 36%
This flight has an on-time performance of 36%. 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
0.0 of 5
Very Poor
Average Delay Time 102.86666666666666 min
This flight has an average delay of 102.86666666666666 minutes with a standard deviation of 250 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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