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(UA) United Airlines 4599 On-Time Performance Rating

Date Range:

15-Feb-2026 to 15-Apr-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
27
47%
Late
7
12%
Very Late
4
7%
Excessive
13
23%
Cancelled
5
9%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
56
Total Delays ( > 1 min )
33
Codeshares
56
Average Delay (min.)
66.45454545454545
Standard Deviation
77.4
Min
0
Max
268

UA 4599 On-Time Performance Details

Overall Rating
0.0 of 5
Very Poor
Percentage On-Time 48%
Average Delay Time 66.45454545454545 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0 shows that this flight has on-time performance characteristics better than 0% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 48%
This flight has an on-time performance of 48%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 66.45454545454545 min
This flight has an average delay of 66.45454545454545 minutes with a standard deviation of 77.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.