(UA) United Airlines 1239 On-Time Performance Rating

Date Range:

01-Dec-2025 to 31-Jan-2026

(IAH) Houston George Bush Intercontinental Airport

Houston, TX, US

(DEN) Denver International Airport

Denver, CO, US

On-Time Performance Chart

(using rounded numbers)

On-Time

96%

Late

Very Late

Excessive

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

17.666666666666668

Standard Deviation

9.1

Min

Max

UA 1239 On-Time Performance Details

Overall Rating

4.3 of 5

Good

Percentage On-Time 96%

Average Delay Time 17.666666666666668 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.3 shows that this flight has on-time performance characteristics better than 85% of all other flights in the FlightStats database.

On-Time Performance Rating

5.0 of 5

Very Good

Percentage On-Time 96%

This flight has an on-time performance of 96%. 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

3.6 of 5

Good

Average Delay Time 17.666666666666668 min

This flight has an average delay of 17.666666666666668 minutes with a standard deviation of 9.1 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 73% of other flights.