UA400 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA400, which currently operates between the airports of Tucson - Tucson International Airport (Airport Code TUS) and Denver - Denver International Airport (Airport Code DEN).
This flight data pertains specifically to the flight's details for Wednesday, September 24, 2025.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA400
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA400
UA400 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
UA400 United Airlines from Tucson
We only provide flight information for yesterday, today and tomorrow. This flight is not scheduled for this interval of time.
We only provide flight information for yesterday, today and tomorrow. This flight is not scheduled for this interval of time.
Airline information
United Airlines
Departure
Tucson (TUS)
September 24, 2025
Tucson International Airport
Arrival
Denver (DEN)
September 24, 2025
Denver International Airport
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.denver-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:
- AC4083 - Air Canada
Additional Information
Which is the frequency of flight UA400?
The flight UA400 is currently not scheduled at Denver Airport (DEN).
Which is the distance of flight UA400?
The distance between the two airports is 638 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 Tucson: 2026-04-12 16:46:07
Current Time in Denver: 2026-04-12 17:46:07
The flight UA400 is currently not scheduled at Denver Airport (DEN).
Which is the distance of flight UA400?
The distance between the two airports is 638 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 Tucson: 2026-04-12 16:46:07
Current Time in Denver: 2026-04-12 17:46:07
Alternative Flights
The following airlines serves the same route between Tucson and Denver:
Frontier Airlines
- Flight Number: F92614. (On Time performance: 81 - Average Delay: 16 minutes)
SkyWest Airlines
- Flight Number: OO6010.
United Airlines
- Flight Number: UA1009. (On Time performance: 83 - Average Delay: 13 minutes)
- Flight Number: UA1686. (On Time performance: 89 - Average Delay: 12 minutes)
- Flight Number: UA2354. (On Time performance: 93 - Average Delay: 3 minutes)
- Flight Number: UA2671. (On Time performance: 88 - Average Delay: 11 minutes)
- Flight Number: UA5598. (On Time performance: 83 - Average Delay: 35 minutes)
- Flight Number: UA5820. (On Time performance: 82 - Average Delay: 10 minutes)
- Flight Number: UA6010. (On Time performance: 67 - Average Delay: 25 minutes)
Southwest Airlines
- Flight Number: WN1362. (On Time performance: 80 - Average Delay: 11 minutes)
- Flight Number: WN1693. (On Time performance: 62 - Average Delay: 13 minutes)
- Flight Number: WN1723. (On Time performance: 80 - Average Delay: 7 minutes)
- Flight Number: WN2038. (On Time performance: 67 - Average Delay: 26 minutes)
- Flight Number: WN2603. (On Time performance: 85 - Average Delay: 8 minutes)
- Flight Number: WN2659. (On Time performance: 88 - Average Delay: 9 minutes)
- Flight Number: WN3900.
- Flight Number: WN4038. (On Time performance: 71 - Average Delay: 15 minutes)
- Flight Number: WN4597.
- Flight Number: WN4598.
Frontier Airlines
- Flight Number: F92614. (On Time performance: 81 - Average Delay: 16 minutes)
SkyWest Airlines
- Flight Number: OO6010.
United Airlines
- Flight Number: UA1009. (On Time performance: 83 - Average Delay: 13 minutes)
- Flight Number: UA1686. (On Time performance: 89 - Average Delay: 12 minutes)
- Flight Number: UA2354. (On Time performance: 93 - Average Delay: 3 minutes)
- Flight Number: UA2671. (On Time performance: 88 - Average Delay: 11 minutes)
- Flight Number: UA5598. (On Time performance: 83 - Average Delay: 35 minutes)
- Flight Number: UA5820. (On Time performance: 82 - Average Delay: 10 minutes)
- Flight Number: UA6010. (On Time performance: 67 - Average Delay: 25 minutes)
Southwest Airlines
- Flight Number: WN1362. (On Time performance: 80 - Average Delay: 11 minutes)
- Flight Number: WN1693. (On Time performance: 62 - Average Delay: 13 minutes)
- Flight Number: WN1723. (On Time performance: 80 - Average Delay: 7 minutes)
- Flight Number: WN2038. (On Time performance: 67 - Average Delay: 26 minutes)
- Flight Number: WN2603. (On Time performance: 85 - Average Delay: 8 minutes)
- Flight Number: WN2659. (On Time performance: 88 - Average Delay: 9 minutes)
- Flight Number: WN3900.
- Flight Number: WN4038. (On Time performance: 71 - Average Delay: 15 minutes)
- Flight Number: WN4597.
- Flight Number: WN4598.
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: We have gathered available data from last twelve closed months, spanning from September 08, 2025 to September 24, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.
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 September 08, 2025 to September 24, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.
Last Past Flights UA400
No flights for UA400 were scheduled in the past month. The last flight took place on Wednesday, September 24, 2025