(UA) United Airlines 1239 On-Time Performance Rating

Date Range:

15-Oct-2025 to 15-Dec-2025

(EWR) Newark Liberty International Airport

Newark, NJ, US

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

On-Time Performance Chart

(using rounded numbers)

On-Time

71%

Late

14%

Very Late

Excessive

14%

Cancelled

Diverted

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed

Total Delays ( > 1 min )

Codeshares

Average Delay (min.)

Standard Deviation

28.3

Min

Max

UA 1239 On-Time Performance Details

Overall Rating

2.1 of 5

Average

Percentage On-Time 71%

Average Delay Time 31 min

FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.1 shows that this flight has on-time performance characteristics better than 41% of all other flights in the FlightStats database.

On-Time Performance Rating

1.5 of 5

Poor

Percentage On-Time 71%

This flight has an on-time performance of 71%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 31% of other flights.

Delay Performance

2.7 of 5

Average

Average Delay Time 31 min

This flight has an average delay of 31 minutes with a standard deviation of 28.3 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 54% of other flights.