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(UA) United Airlines 4558 On-Time Performance Rating

Date Range:

15-Mar-2026 to 15-May-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
12
75%
Late
1
6%
Very Late
1
6%
Excessive
2
13%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
16
Total Delays ( > 1 min )
8
Codeshares
16
Average Delay (min.)
25.125
Standard Deviation
23.6
Min
0
Max
70

UA 4558 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 75%
Average Delay Time 25.125 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 47% of all other flights in the FlightStats database.
On-Time Performance Rating
1.7 of 5
Average
Percentage On-Time 75%
This flight has an on-time performance of 75%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 34% of other flights.
Delay Performance
3.1 of 5
Average
Average Delay Time 25.125 min
This flight has an average delay of 25.125 minutes with a standard deviation of 23.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 62% of other flights.

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