Flights for UA521 These are not all the flights that UA521 has taken, just some of them that have flown in or out of SFO

UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 02, 2023, was operated by another airline. It arrived at gate F17. Passengers were flying aboard a Boeing 757-300 with tail number N75851. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 01, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-300 with tail number N57862. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 31, 2023, was operated by another airline. It arrived at gate F12. Passengers were flying aboard a Boeing 757-300 with tail number N74856. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 30, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-300 with tail number N75861. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 29, 2023, was operated by another airline. It arrived at gate F12. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 28, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-300 with tail number N77867. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 27, 2023, was operated by another airline. It arrived at gate F12. Passengers were flying aboard a Boeing 757-300 with tail number N75854. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 26, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-300 with tail number N57855. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 25, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-300 with tail number N57864. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 24, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-300 with tail number N75854. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 23, 2023, was operated by another airline. It arrived at gate F20. Passengers were flying aboard a Boeing 757-300 with tail number N78866. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 22, 2023, was operated by another airline. It arrived at gate F20. Passengers were flying aboard a Boeing 757-300 with tail number N75854. See all the flights for UA521.