background

(UA) United Airlines 4521 On-Time Performance Rating

Date Range:

01-Mar-2026 to 30-Apr-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(CVG) Cincinnati/Northern Kentucky International Airport

Cincinnati, OH, US

On-Time Performance Chart

(using rounded numbers)
On-Time
26
76%
Late
4
12%
Very Late
3
9%
Excessive
1
3%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
34
Total Delays ( > 1 min )
11
Codeshares
34
Average Delay (min.)
25.181818181818183
Standard Deviation
20.4
Min
0
Max
73

UA 4521 On-Time Performance Details

Overall Rating
2.8 of 5
Average
Percentage On-Time 77%
Average Delay Time 25.181818181818183 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8 shows that this flight has on-time performance characteristics better than 55% of all other flights in the FlightStats database.
On-Time Performance Rating
2.1 of 5
Average
Percentage On-Time 77%
This flight has an on-time performance of 77%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 42% of other flights.
Delay Performance
3.5 of 5
Average
Average Delay Time 25.181818181818183 min
This flight has an average delay of 25.181818181818183 minutes with a standard deviation of 20.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 69% of other flights.

Other Stops for UA 4521