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(UA) United Airlines 4599 On-Time Performance Rating

Date Range:

15-Dec-2025 to 15-Feb-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(BHM) Birmingham-Shuttlesworth International Airport

Birmingham, AL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
21
54%
Late
4
10%
Very Late
0
0%
Excessive
11
28%
Cancelled
0
0%
Diverted
3
8%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
36
Total Delays ( > 1 min )
17
Codeshares
36
Average Delay (min.)
64.47058823529412
Standard Deviation
49.6
Min
0
Max
179

UA 4599 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 58%
Average Delay Time 64.47058823529412 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.1 shows that this flight has on-time performance characteristics better than 1% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 58%
This flight has an on-time performance of 58%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 2% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 64.47058823529412 min
This flight has an average delay of 64.47058823529412 minutes with a standard deviation of 49.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 2% of other flights.

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