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(UA) United Airlines 4015 On-Time Performance Rating

Date Range:

15-Aug-2026 to 15-Oct-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
35
81%
Late
3
7%
Very Late
1
2%
Excessive
3
7%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
42
Total Delays ( > 1 min )
12
Codeshares
42
Average Delay (min.)
48.666666666666664
Standard Deviation
62.7
Min
0
Max
154

UA 4015 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 83%
Average Delay Time 48.666666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 49% of all other flights in the FlightStats database.
On-Time Performance Rating
4.3 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 86% of other flights.
Delay Performance
0.7 of 5
Poor
Average Delay Time 48.666666666666664 min
This flight has an average delay of 48.666666666666664 minutes with a standard deviation of 62.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 14% of other flights.

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