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 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.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 21, 2023, was operated by another airline. It arrived at gate F21. 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 20, 2023, was operated by another airline. It arrived at gate F12. Passengers were flying aboard a Boeing 757-300 with tail number N77865. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 19, 2023, was operated by another airline. It arrived at gate F12. Passengers were flying aboard a Boeing 757-300 with tail number N75853. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 18, 2023, was operated by another airline. It arrived at gate F12. 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 January 17, 2023, was operated by another airline. It arrived at gate F17. 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 16, 2023, was operated by another airline. It arrived at gate F16. 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 January 15, 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 14, 2023, was operated by another airline. It arrived at gate F21. Passengers were flying aboard a Boeing 757-300 with tail number N57868. See all the flights for UA521.