Flights for the airplane with tail number N37521 These are not all the flights for this airplane, just the ones that have flown in and out of SFO since we've been counting. See all the airports this plane has visited for those flights or all the airplanes we've logged so far.

UA1057 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on May 16, 2023, was operated by another airline. It arrived at gate F12. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1057.
UA1826 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on May 16, 2023, was operated by another airline. It departed from gate E10. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1826.
UA1778 (MCO-SFO)
This United Airlines flight between Orlando International Airport and San Francisco International Airport, on May 15, 2023, was operated by another airline. It arrived at gate E10. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1778.
UA1997 (SFO-MCO)
This United Airlines flight between San Francisco International Airport and Orlando International Airport, on May 15, 2023, was operated by another airline. It departed from gate E11. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1997.
UA1240 (PHX-SFO)
This United Airlines flight between Sky Harbor International Airport and San Francisco International Airport, on May 15, 2023, was operated by another airline. It arrived at gate E11. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1240.
UA683 (SFO-PHX)
This United Airlines flight between San Francisco International Airport and Sky Harbor International Airport, on May 14, 2023, was operated by another airline. It departed from gate G1. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA683.
UA1118 (CUN-SFO)
This United Airlines flight traveled from Cancun Airport to San Francisco International Airport, on May 14, 2023. It arrived at gate G1. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1118.
UA2482 (SFO-FLL)
This United Airlines flight between San Francisco International Airport and Fort Lauderdale Hollywood International Airport, on May 12, 2023, was operated by another airline. It departed from gate E2. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2482.
UA1971 (MIA-SFO)
This United Airlines flight between Miami International Airport and San Francisco International Airport, on May 12, 2023, was operated by another airline. It arrived at gate E2. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1971.
UA410 (SFO-MIA)
This United Airlines flight between San Francisco International Airport and Miami International Airport, on May 12, 2023, was operated by another airline. It departed from gate E10. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA410.
UA1581 (SFO-HNL)
This United Airlines flight between San Francisco International Airport and Honolulu International Airport, on May 10, 2023, was operated by another airline. It departed from gate E6. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1581.
UA2238 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on May 09, 2023, was operated by another airline. It arrived at gate E9. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2238.