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(UA) United Airlines 4637 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(BIL) Billings Logan International Airport

Billings, MT, US

(DEN) Denver International Airport

Denver, CO, US

On-Time Performance Chart

(using rounded numbers)
On-Time
26
87%
Late
1
3%
Very Late
0
0%
Excessive
2
7%
Cancelled
0
0%
Diverted
1
3%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
29
Total Delays ( > 1 min )
9
Codeshares
29
Average Delay (min.)
29.444444444444443
Standard Deviation
38.1
Min
0
Max
117

UA 4637 On-Time Performance Details

Overall Rating
3.9 of 5
Good
Percentage On-Time 90%
Average Delay Time 29.444444444444443 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 76% of all other flights in the FlightStats database.
On-Time Performance Rating
4.8 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 96% of other flights.
Delay Performance
2.9 of 5
Average
Average Delay Time 29.444444444444443 min
This flight has an average delay of 29.444444444444443 minutes with a standard deviation of 38.1 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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