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(UA) United Airlines 4491 On-Time Performance Rating

Date Range:

01-Apr-2026 to 31-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
33
65%
Late
2
4%
Very Late
3
6%
Excessive
11
22%
Cancelled
0
0%
Diverted
2
4%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
49
Total Delays ( > 1 min )
24
Codeshares
49
Average Delay (min.)
60.5
Standard Deviation
73.2
Min
0
Max
298

UA 4491 On-Time Performance Details

Overall Rating
0.1 of 5
Very Poor
Percentage On-Time 67%
Average Delay Time 60.5 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 0% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 67%
This flight has an on-time performance of 67%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 2% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 60.5 min
This flight has an average delay of 60.5 minutes with a standard deviation of 73.2 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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