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(UA) United Airlines 1521 On-Time Performance Rating

Date Range:

15-Aug-2025 to 15-Oct-2025

(DEN) Denver International Airport

Denver, CO, US

(CLE) Cleveland Hopkins International Airport

Cleveland, OH, US

On-Time Performance Chart

(using rounded numbers)
On-Time
53
85%
Late
4
6%
Very Late
4
6%
Excessive
0
0%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
16
Codeshares
0
Average Delay (min.)
16.875
Standard Deviation
13.8
Min
0
Max
38

UA 1521 On-Time Performance Details

Overall Rating
4.6 of 5
Very Good
Percentage On-Time 87%
Average Delay Time 16.875 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.6 shows that this flight has on-time performance characteristics better than 91% of all other flights in the FlightStats database.
On-Time Performance Rating
4.9 of 5
Very Good
Percentage On-Time 87%
This flight has an on-time performance of 87%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 98% of other flights.
Delay Performance
4.3 of 5
Good
Average Delay Time 16.875 min
This flight has an average delay of 16.875 minutes with a standard deviation of 13.8 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 86% of other flights.