UA1239 United Airlines - Flight Status

Which is the frequency of flight UA1239?
The flight UA1239 is scheduled to flight on daily basis.

Which is the distance of flight UA1239?
The distance between the two airports is 1825 miles.

Which is the flight time of flight UA1239?
The scheduled flight time gate to gate is: 04:24 hours.
The real flight time gate to gate on average is: 04:19 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in San Jose: 2026-11-03 18:15:58
Current Time in Chicago: 2026-11-03 20:15:58

The following airline serve the same route between San Jose and Chicago:
United Airlines - Flight Number: UA2004. (On Time performance: 57 - Average Delay: 19 minutes)

We have gathered data from recent months and present below an analysis of how timely the flights have been.

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from October 25, 2026 to October 31, 2026. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.