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(UA) United Airlines 4439 On-Time Performance Rating

Date Range:

15-Apr-2026 to 15-Jun-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(LEX) Blue Grass Airport

Lexington, KY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
11
58%
Late
1
5%
Very Late
1
5%
Excessive
6
32%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
19
Total Delays ( > 1 min )
11
Codeshares
19
Average Delay (min.)
68.72727272727273
Standard Deviation
65.3
Min
0
Max
212

UA 4439 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 58%
Average Delay Time 68.72727272727273 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 1% of other flights.
Delay Performance
0.1 of 5
Very Poor
Average Delay Time 68.72727272727273 min
This flight has an average delay of 68.72727272727273 minutes with a standard deviation of 65.3 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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