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(UA) United Airlines 4540 On-Time Performance Rating

Date Range:

01-Jul-2026 to 31-Aug-2026

(CHA) Chattanooga Metropolitan Airport

Chattanooga, TN, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
53
87%
Late
4
7%
Very Late
1
2%
Excessive
3
5%
Cancelled
0
0%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
61
Total Delays ( > 1 min )
16
Codeshares
61
Average Delay (min.)
108.75
Standard Deviation
223.2
Min
0
Max
788

UA 4540 On-Time Performance Details

Overall Rating
2.5 of 5
Average
Percentage On-Time 87%
Average Delay Time 108.75 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.5 shows that this flight has on-time performance characteristics better than 49% of all other flights in the FlightStats database.
On-Time Performance Rating
5.0 of 5
Very Good
Percentage On-Time 87%
This flight has an on-time performance of 87%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 100% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 108.75 min
This flight has an average delay of 108.75 minutes with a standard deviation of 223.2 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.