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(UA) United Airlines 4559 On-Time Performance Rating

Date Range:

15-Nov-2025 to 15-Jan-2026

(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
0
0%
Late
0
0%
Very Late
0
0%
Excessive
1
100%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

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

UA 4559 On-Time Performance Details

Overall Rating
1.2 of 5
Poor
Percentage On-Time 0%
Average Delay Time 47 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.2 shows that this flight has on-time performance characteristics better than 22% of all other flights in the FlightStats database.
On-Time Performance Rating
0.2 of 5
Very Poor
Percentage On-Time 0%
This flight has an on-time performance of 0%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 4% of other flights.
Delay Performance
2.1 of 5
Average
Average Delay Time 47 min
This flight has an average delay of 47 minutes with a standard deviation of 0 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 42% of other flights.

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