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 (SFO-BOI)
This United Airlines flight between San Francisco International Airport and Boise Air Terminal, on March 31, 2023, was operated by another airline. It departed from gate F4. Passengers were flying aboard an Airbus A319 with tail number N808UA. See all the flights for UA521.
UA521 (SFO-BOI)
This United Airlines flight between San Francisco International Airport and Boise Air Terminal, on March 30, 2023, was operated by another airline. It departed from gate F1. Passengers were flying aboard an Airbus A319 with tail number N825UA. See all the flights for UA521.
UA521 (SFO-BOI)
This United Airlines flight between San Francisco International Airport and Boise Air Terminal, on March 29, 2023, was operated by another airline. It departed from gate F1. Passengers were flying aboard an Airbus A320-200 with tail number N464UA. See all the flights for UA521.
UA521 (SFO-BOI)
This United Airlines flight between San Francisco International Airport and Boise Air Terminal, on March 28, 2023, was operated by another airline. It departed from gate F3. Passengers were flying aboard an Airbus A319 with tail number N4888U. See all the flights for UA521.
UA521 (SFO-BOI)
This United Airlines flight between San Francisco International Airport and Boise Air Terminal, on March 27, 2023, was operated by another airline. It departed from gate E8. Passengers were flying aboard an Airbus A319 with tail number N876UA. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 09, 2023, was operated by another airline. It arrived at gate D11. Passengers were flying aboard a Boeing 737-900 with tail number N38451. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 08, 2023, was operated by another airline. It arrived at gate E11. Passengers were flying aboard a Boeing 737-900 with tail number N39461. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 07, 2023, was operated by another airline. It arrived at gate E7. 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 February 06, 2023, was operated by another airline. It arrived at gate F12. Passengers were flying aboard a Boeing 757-300 with tail number N77871. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 05, 2023, was operated by another airline. It arrived at gate F14. Passengers were flying aboard a Boeing 757-300 with tail number N57863. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 04, 2023, was operated by another airline. It arrived at gate F14. Passengers were flying aboard a Boeing 757-300 with tail number N57852. See all the flights for UA521.
UA521 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on February 03, 2023, was operated by another airline. It arrived at gate F14. Passengers were flying aboard a Boeing 757-300 with tail number N57855. See all the flights for UA521.