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 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 14, 2022, was operated by another airline. It arrived at gate F17. Passengers were flying aboard a Boeing 757-200 with tail number N17126. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 13, 2022, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-200 with tail number N19117. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 12, 2022, was operated by another airline. It arrived at gate F19. Passengers were flying aboard a Boeing 757-200 with tail number N19117. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 11, 2022, was operated by another airline. It arrived at gate F21. Passengers were flying aboard a Boeing 757-200 with tail number N17139. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 10, 2022, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-200 with tail number N12116. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 08, 2022, was operated by another airline. It arrived at gate F20. Passengers were flying aboard a Boeing 757-200 with tail number N19117. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 06, 2022, was operated by another airline. It arrived at gate F20. Passengers were flying aboard a Boeing 757-200 with tail number N17139. See all the flights for UA521.
UA521 (SFO-PHX)
This United Airlines flight between San Francisco International Airport and Sky Harbor International Airport, on September 04, 2022, was operated by another airline. It departed from gate E13. Passengers were flying aboard a Boeing 737-800 with tail number N35271. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 04, 2022, was operated by another airline. It arrived at gate F14. Passengers were flying aboard a Boeing 757-200 with tail number N57111. See all the flights for UA521.
UA521 (SFO-PHX)
This United Airlines flight between San Francisco International Airport and Sky Harbor International Airport, on September 01, 2022, was operated by another airline. It departed from gate E11. Passengers were flying aboard a Boeing 737-800 with tail number N37267. See all the flights for UA521.
UA521 (JFK-SFO)
This United Airlines flight between John F Kennedy International Airport and San Francisco International Airport, on September 01, 2022, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 757-200 with tail number N48127. See all the flights for UA521.
UA521 (SFO-PHX)
This United Airlines flight between San Francisco International Airport and Sky Harbor International Airport, on August 31, 2022, was operated by another airline. It departed from gate E7. Passengers were flying aboard a Boeing 737-800 with tail number N78511. See all the flights for UA521.