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(UA) United Airlines 4639 On-Time Performance Rating

Date Range:

15-May-2026 to 15-Jul-2026

(COU) Columbia Regional Airport

Columbia, MO, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)
On-Time
19
79%
Late
1
4%
Very Late
0
0%
Excessive
3
13%
Cancelled
1
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
24
Total Delays ( > 1 min )
9
Codeshares
24
Average Delay (min.)
107.66666666666667
Standard Deviation
154.6
Min
0
Max
389

UA 4639 On-Time Performance Details

Overall Rating
1.8 of 5
Average
Percentage On-Time 79%
Average Delay Time 107.66666666666667 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.8 shows that this flight has on-time performance characteristics better than 34% of all other flights in the FlightStats database.
On-Time Performance Rating
3.5 of 5
Average
Percentage On-Time 79%
This flight has an on-time performance of 79%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 69% of other flights.
Delay Performance
0.0 of 5
Very Poor
Average Delay Time 107.66666666666667 min
This flight has an average delay of 107.66666666666667 minutes with a standard deviation of 154.6 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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