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(UA) United Airlines 4015 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-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
39
83%
Late
3
6%
Very Late
0
0%
Excessive
2
4%
Cancelled
3
6%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
47
Total Delays ( > 1 min )
17
Codeshares
47
Average Delay (min.)
15.411764705882353
Standard Deviation
21.5
Min
0
Max
79

UA 4015 On-Time Performance Details

Overall Rating
4.6 of 5
Very Good
Percentage On-Time 83%
Average Delay Time 15.411764705882353 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 90% of all other flights in the FlightStats database.
On-Time Performance Rating
4.5 of 5
Good
Percentage On-Time 83%
This flight has an on-time performance of 83%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 90% of other flights.
Delay Performance
4.6 of 5
Very Good
Average Delay Time 15.411764705882353 min
This flight has an average delay of 15.411764705882353 minutes with a standard deviation of 21.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 92% of other flights.

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