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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

(GRB) Green Bay Austin Straubel International Airport

Green Bay, WI, US

On-Time Performance Chart

(using rounded numbers)
On-Time
2
33%
Late
0
0%
Very Late
0
0%
Excessive
4
67%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
6
Total Delays ( > 1 min )
5
Codeshares
6
Average Delay (min.)
73.8
Standard Deviation
50.2
Min
0
Max
145

UA 4539 On-Time Performance Details

Overall Rating
0.3 of 5
Very Poor
Percentage On-Time 33%
Average Delay Time 73.8 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.3 shows that this flight has on-time performance characteristics better than 4% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 33%
This flight has an on-time performance of 33%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
0.4 of 5
Very Poor
Average Delay Time 73.8 min
This flight has an average delay of 73.8 minutes with a standard deviation of 50.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 8% of other flights.

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