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(UA) United Airlines 4535 On-Time Performance Rating

Date Range:

15-Jul-2026 to 15-Sep-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(RIC) Richmond International Airport

Richmond, VA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
24
96%
Late
0
0%
Very Late
1
4%
Excessive
0
0%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
25
Total Delays ( > 1 min )
4
Codeshares
25
Average Delay (min.)
15.5
Standard Deviation
14.4
Min
0
Max
36

UA 4535 On-Time Performance Details

Overall Rating
4.4 of 5
Good
Percentage On-Time 96%
Average Delay Time 15.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.4 shows that this flight has on-time performance characteristics better than 87% of all other flights in the FlightStats database.
On-Time Performance Rating
5.0 of 5
Very Good
Percentage On-Time 96%
This flight has an on-time performance of 96%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 100% of other flights.
Delay Performance
3.8 of 5
Good
Average Delay Time 15.5 min
This flight has an average delay of 15.5 minutes with a standard deviation of 14.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 76% of other flights.

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