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(UA) United Airlines 4459 On-Time Performance Rating

Date Range:

01-Mar-2026 to 30-Apr-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
13
87%
Late
0
0%
Very Late
0
0%
Excessive
1
7%
Cancelled
0
0%
Diverted
1
7%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
14
Total Delays ( > 1 min )
6
Codeshares
14
Average Delay (min.)
29.5
Standard Deviation
48.3
Min
0
Max
128

UA 4459 On-Time Performance Details

Overall Rating
3.6 of 5
Good
Percentage On-Time 93%
Average Delay Time 29.5 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.6 shows that this flight has on-time performance characteristics better than 71% of all other flights in the FlightStats database.
On-Time Performance Rating
4.5 of 5
Good
Percentage On-Time 93%
This flight has an on-time performance of 93%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 90% of other flights.
Delay Performance
2.7 of 5
Average
Average Delay Time 29.5 min
This flight has an average delay of 29.5 minutes with a standard deviation of 48.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 54% of other flights.

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