(UA) United Airlines 4638 On-Time Performance Rating

Date Range:

15-Jan-2026 to 15-Mar-2026

(DEN) Denver International Airport

Denver, CO, US

(PIA) General Wayne A. Downing Peoria Intl Airport

Peoria, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

54%

Late

13%

Very Late

Excessive

13%

Cancelled

13%

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

47.4

Standard Deviation

48.3

Min

Max

164

UA 4638 On-Time Performance Details

Overall Rating

0.6 of 5

Poor

Percentage On-Time 54%

Average Delay Time 47.4 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.6 shows that this flight has on-time performance characteristics better than 10% of all other flights in the FlightStats database.

On-Time Performance Rating

0.0 of 5

Very Poor

Percentage On-Time 54%

This flight has an on-time performance of 54%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.

Delay Performance

1.1 of 5

Poor

Average Delay Time 47.4 min

This flight has an average delay of 47.4 minutes with a standard deviation of 48.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 21% of other flights.