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(UA) United Airlines 4335 On-Time Performance Rating

Date Range:

01-May-2026 to 30-Jun-2026

(IAD) Washington Dulles International Airport

Dulles, VA, US

(PHL) Philadelphia International Airport

Philadelphia, PA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
11
69%
Late
1
6%
Very Late
0
0%
Excessive
2
13%
Cancelled
1
6%
Diverted
1
6%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
15
Total Delays ( > 1 min )
4
Codeshares
15
Average Delay (min.)
77.25
Standard Deviation
86.6
Min
0
Max
196

UA 4335 On-Time Performance Details

Overall Rating
1.0 of 5
Poor
Percentage On-Time 73%
Average Delay Time 77.25 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1 shows that this flight has on-time performance characteristics better than 19% of all other flights in the FlightStats database.
On-Time Performance Rating
1.7 of 5
Average
Percentage On-Time 73%
This flight has an on-time performance of 73%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 34% of other flights.
Delay Performance
0.3 of 5
Very Poor
Average Delay Time 77.25 min
This flight has an average delay of 77.25 minutes with a standard deviation of 86.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 7% of other flights.

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