UA521 (DEN-SFO) on January 23, 2023 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's arrival at SFO on this date
Sometimes flight paths may look a bit weird in places, because that is (can be) the nature of radar data. It should still give you a rough idea of where this flight traveled to and from though.