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(UA) United Airlines 4539 On-Time Performance Rating

Date Range:

01-Nov-2025 to 31-Dec-2025

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(ABE) Lehigh Valley International Airport

Allentown, PA, US

On-Time Performance Chart

(using rounded numbers)
On-Time
12
75%
Late
1
6%
Very Late
1
6%
Excessive
1
6%
Cancelled
1
6%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
16
Total Delays ( > 1 min )
5
Codeshares
16
Average Delay (min.)
37
Standard Deviation
42
Min
0
Max
109

UA 4539 On-Time Performance Details

Overall Rating
2.6 of 5
Average
Percentage On-Time 75%
Average Delay Time 37 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.6 shows that this flight has on-time performance characteristics better than 51% of all other flights in the FlightStats database.
On-Time Performance Rating
2.9 of 5
Average
Percentage On-Time 75%
This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 58% of other flights.
Delay Performance
2.3 of 5
Average
Average Delay Time 37 min
This flight has an average delay of 37 minutes with a standard deviation of 42 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 46% of other flights.

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