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(UA) United Airlines 4559 On-Time Performance Rating

Date Range:

15-Nov-2025 to 15-Jan-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(SDF) Louisville Muhammad Ali International Airport

Louisville, KY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
23
64%
Late
1
3%
Very Late
1
3%
Excessive
9
25%
Cancelled
1
3%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
35
Total Delays ( > 1 min )
16
Codeshares
35
Average Delay (min.)
107.75
Standard Deviation
119.7
Min
0
Max
375

UA 4559 On-Time Performance Details

Overall Rating
0.4 of 5
Very Poor
Percentage On-Time 66%
Average Delay Time 107.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.4 shows that this flight has on-time performance characteristics better than 6% of all other flights in the FlightStats database.
On-Time Performance Rating
0.7 of 5
Poor
Percentage On-Time 66%
This flight has an on-time performance of 66%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 14% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 107.75 min
This flight has an average delay of 107.75 minutes with a standard deviation of 119.7 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.

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