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(UA) United Airlines 1239 On-Time Performance Rating

Date Range:

01-May-2026 to 30-Jun-2026

(ORD) Chicago O'Hare International Airport

Chicago, IL, US

(ROC) Frederick Douglass Greater Rochester Intl Airport

Rochester, NY, US

On-Time Performance Chart

(using rounded numbers)
On-Time
39
68%
Late
5
9%
Very Late
4
7%
Excessive
7
12%
Cancelled
0
0%
Diverted
2
4%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
55
Total Delays ( > 1 min )
27
Codeshares
0
Average Delay (min.)
37.592592592592595
Standard Deviation
47.5
Min
0
Max
209

UA 1239 On-Time Performance Details

Overall Rating
1.2 of 5
Poor
Percentage On-Time 71%
Average Delay Time 37.592592592592595 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 1.2 shows that this flight has on-time performance characteristics better than 22% of all other flights in the FlightStats database.
On-Time Performance Rating
0.6 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 12% of other flights.
Delay Performance
1.7 of 5
Average
Average Delay Time 37.592592592592595 min
This flight has an average delay of 37.592592592592595 minutes with a standard deviation of 47.5 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 34% of other flights.

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