UA425 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA425, which currently operates between the airports of Denver - Denver International Airport (Airport Code DEN) and Ontario - Ontario International Airport (Airport Code ONT).
This flight data pertains specifically to the flight's details for Sunday, December 21, 2025.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA425
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA425
UA425 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions. Flight Status
UA425 United Airlines from Denver
Scheduled - On-time
Flight Status for Sunday December 21, 2025
This flight was also scheduled for Yesterday (December 20, 2025). See it here
This flight is also scheduled for Tomorrow (December 22, 2025). See it here
Scheduled - On-time
Flight Status for Sunday December 21, 2025
Airline information
United Airlines
Equipment: Boeing 737-900 (winglets) Passenger/BBJ3
Departure
Denver (DEN)
December 21, 2025
Denver International Airport
Estimated Departure Time:
07:43 pm
Terminal:
-
Gate:
B38
Scheduled Departure Time: 07:43 pm
Arrival
Ontario (ONT)
December 21, 2025
Ontario International Airport
Estimated Arrival Time:
09:07 pm
Terminal:
2
Gate:
-
Scheduled Arrival Time: 09:07 pm
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.ontario-airport.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.
Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- AC3499 - Air Canada
Additional Information
Which is the frequency of flight UA425?
The flight UA425 is scheduled to flight on Thursday, Friday, Saturday, Sunday on a weekly basis.
Which is the distance of flight UA425?
The distance between the two airports is 817 miles.
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 Denver: 2025-12-21 16:17:45
Current Time in Ontario: 2025-12-21 15:17:45
The flight UA425 is scheduled to flight on Thursday, Friday, Saturday, Sunday on a weekly basis.
Which is the distance of flight UA425?
The distance between the two airports is 817 miles.
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 Denver: 2025-12-21 16:17:45
Current Time in Ontario: 2025-12-21 15:17:45
Alternative Flights
The following airlines serves the same route between Denver and Ontario:
UPS
- Flight Number: 5X2805. (On Time performance: 85 - Average Delay: 9 minutes)
- Flight Number: 5X804.
- Flight Number: 5X805. (On Time performance: 63 - Average Delay: 16 minutes)
- Flight Number: 5X825. (On Time performance: 73 - Average Delay: 9 minutes)
Air Transport International
- Flight Number: 8C3331. (On Time performance: 23 - Average Delay: 40 minutes)
Frontier Airlines
- Flight Number: F91261. (On Time performance: 93 - Average Delay: 4 minutes)
- Flight Number: F91499. (On Time performance: 81 - Average Delay: 14 minutes)
United Airlines
- Flight Number: UA1109. (On Time performance: 83 - Average Delay: 10 minutes)
- Flight Number: UA2028. (On Time performance: 81 - Average Delay: 7 minutes)
- Flight Number: UA430. (On Time performance: 88 - Average Delay: 7 minutes)
Southwest Airlines
- Flight Number: WN2571. (On Time performance: 70 - Average Delay: 13 minutes)
- Flight Number: WN2576. (On Time performance: 76 - Average Delay: 10 minutes)
- Flight Number: WN2578. (On Time performance: 59 - Average Delay: 27 minutes)
- Flight Number: WN4721.
- Flight Number: WN533. (On Time performance: 84 - Average Delay: 8 minutes)
UPS
- Flight Number: 5X2805. (On Time performance: 85 - Average Delay: 9 minutes)
- Flight Number: 5X804.
- Flight Number: 5X805. (On Time performance: 63 - Average Delay: 16 minutes)
- Flight Number: 5X825. (On Time performance: 73 - Average Delay: 9 minutes)
Air Transport International
- Flight Number: 8C3331. (On Time performance: 23 - Average Delay: 40 minutes)
Frontier Airlines
- Flight Number: F91261. (On Time performance: 93 - Average Delay: 4 minutes)
- Flight Number: F91499. (On Time performance: 81 - Average Delay: 14 minutes)
United Airlines
- Flight Number: UA1109. (On Time performance: 83 - Average Delay: 10 minutes)
- Flight Number: UA2028. (On Time performance: 81 - Average Delay: 7 minutes)
- Flight Number: UA430. (On Time performance: 88 - Average Delay: 7 minutes)
Southwest Airlines
- Flight Number: WN2571. (On Time performance: 70 - Average Delay: 13 minutes)
- Flight Number: WN2576. (On Time performance: 76 - Average Delay: 10 minutes)
- Flight Number: WN2578. (On Time performance: 59 - Average Delay: 27 minutes)
- Flight Number: WN4721.
- Flight Number: WN533. (On Time performance: 84 - Average Delay: 8 minutes)
Punctuality and delays
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.
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: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
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: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Last Past Flights UA425
Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
20 December
20 December
07:48 pm
Denver (DEN)
Denver (DEN)
09:07 pm
Ontario (ONT)
Ontario (ONT)
02h 19min
Boeing 737-800
Boeing 737-800
Landed - On-time
Friday
19 December
19 December
08:56 pm
Denver (DEN)
Denver (DEN)
10:32 pm
Ontario (ONT)
Ontario (ONT)
02h 36min
Boeing 737-800
Boeing 737-800
Landed - Delayed
Thursday
18 December
18 December
07:40 pm
Denver (DEN)
Denver (DEN)
08:48 pm
Ontario (ONT)
Ontario (ONT)
02h 08min
Boeing 737-800
Boeing 737-800
Landed - On-time