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(UA) United Airlines 4537 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(STL) St Louis Lambert International Airport

Saint Louis, MO, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
5
63%
Late
0
0%
Very Late
1
13%
Excessive
2
25%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
8
Total Delays ( > 1 min )
4
Codeshares
8
Average Delay (min.)
171.75
Standard Deviation
217.3
Min
0
Max
485

UA 4537 On-Time Performance Details

Overall Rating
0.5 of 5
Very Poor
Percentage On-Time 63%
Average Delay Time 171.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.5 shows that this flight has on-time performance characteristics better than 8% of all other flights in the FlightStats database.
On-Time Performance Rating
0.9 of 5
Poor
Percentage On-Time 63%
This flight has an on-time performance of 63%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 18% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 171.75 min
This flight has an average delay of 171.75 minutes with a standard deviation of 217.3 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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