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(UA) United Airlines 4535 On-Time Performance Rating

Date Range:

01-Apr-2025 to 31-May-2025

(IAD) Washington Dulles International Airport

Dulles, VA, US

(BTV) Patrick Leahy Burlington International Airport

Burlington, VT, US

On-Time Performance Chart

(using rounded numbers)
On-Time
28
72%
Late
2
5%
Very Late
1
3%
Excessive
8
21%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
39
Total Delays ( > 1 min )
18
Codeshares
39
Average Delay (min.)
50.666666666666664
Standard Deviation
49.6
Min
0
Max
140

UA 4535 On-Time Performance Details

Overall Rating
0.6 of 5
Poor
Percentage On-Time 72%
Average Delay Time 50.666666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.6 shows that this flight has on-time performance characteristics better than 11% of all other flights in the FlightStats database.
On-Time Performance Rating
0.9 of 5
Poor
Percentage On-Time 72%
This flight has an on-time performance of 72%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 18% of other flights.
Delay Performance
0.3 of 5
Very Poor
Average Delay Time 50.666666666666664 min
This flight has an average delay of 50.666666666666664 minutes with a standard deviation of 49.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 5% of other flights.

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