UA1521 United Airlines - Flight Status
Below, you can find details about United Airlines flight UA1521, which currently operates between the airports of Houston - Houston George Bush Intercontinental Airport (Airport Code IAH) and San Francisco - San Francisco International Airport (Airport Code SFO).
This flight data pertains specifically to the flight's details for Monday, November 03, 2025.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA1521
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights UA1521
UA1521 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
UA1521 United Airlines from Houston
Scheduled - On-time
Flight Status for Monday November 03, 2025
This flight was also scheduled for Yesterday (November 02, 2025). See it here
Scheduled - On-time
Flight Status for Monday November 03, 2025
Airline information
United Airlines
Equipment: Boeing 757-300 (winglets) Passenger
Departure
Houston (IAH)
November 03, 2025
Houston George Bush Intercontinental Airport
Estimated Departure Time:
06:50 pm
Terminal:
C
Gate:
C44
Scheduled Departure Time: 06:50 pm
Arrival
San Francisco (SFO)
November 03, 2025
San Francisco International Airport
Estimated Arrival Time:
09:13 pm
Terminal:
3
Gate:
F14
Scheduled Arrival Time: 09:13 pm
Baggage: 9
Disclaimer
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Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- EK6155 - Emirates
- NZ9209 - Air New Zealand
- OZ9522 - Asiana Airlines
- VA8071 - Virgin Australia
Additional Information
Which is the frequency of flight UA1521?
The flight UA1521 is scheduled to flight on Monday, Saturday, Sunday on a weekly basis.
Which is the distance of flight UA1521?
The distance between the two airports is 1634 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 Houston: 2025-11-03 07:48:40
Current Time in San Francisco: 2025-11-03 05:48:40
The flight UA1521 is scheduled to flight on Monday, Saturday, Sunday on a weekly basis.
Which is the distance of flight UA1521?
The distance between the two airports is 1634 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 Houston: 2025-11-03 07:48:40
Current Time in San Francisco: 2025-11-03 05:48:40
Alternative Flights
The following airline serve the same route between Houston and San Francisco:
United Airlines - Flight Number: UA1535. (On Time performance: 83 - Average Delay: 5 minutes)
United Airlines - Flight Number: UA1535. (On Time performance: 83 - Average Delay: 5 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: We have gathered available data from last twelve closed months, spanning from January 07, 2025 to February 12, 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 January 07, 2025 to February 12, 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 UA1521
Date
Departure
Arrival
Duration
Aircraft
Status
Sunday
02 November
02 November
07:18 pm
Houston (IAH)
Houston (IAH)
09:19 pm
San Francisco (SFO)
San Francisco (SFO)
04h 01min
Boeing 757-300
Boeing 757-300
Landed - On-time
Saturday
01 November
01 November
07:00 pm
Houston (IAH)
Houston (IAH)
09:16 pm
San Francisco (SFO)
San Francisco (SFO)
04h 16min
Boeing 757-300
Boeing 757-300
Landed - On-time