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(UA) United Airlines 4637 On-Time Performance Rating

Date Range:

15-Oct-2025 to 15-Dec-2025

(DEN) Denver International Airport

Denver, CO, US

(TUS) Tucson International Airport

Tucson, AZ, US

On-Time Performance Chart

(using rounded numbers)
On-Time
44
90%
Late
2
4%
Very Late
0
0%
Excessive
1
2%
Cancelled
2
4%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
49
Total Delays ( > 1 min )
5
Codeshares
49
Average Delay (min.)
27.6
Standard Deviation
25.5
Min
0
Max
70

UA 4637 On-Time Performance Details

Overall Rating
3.9 of 5
Good
Percentage On-Time 90%
Average Delay Time 27.6 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 3.9 shows that this flight has on-time performance characteristics better than 77% of all other flights in the FlightStats database.
On-Time Performance Rating
4.9 of 5
Very Good
Percentage On-Time 90%
This flight has an on-time performance of 90%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 99% of other flights.
Delay Performance
2.9 of 5
Average
Average Delay Time 27.6 min
This flight has an average delay of 27.6 minutes with a standard deviation of 25.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 58% of other flights.

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