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.

UA500 (IND-SFO)
This United Airlines flight between Indianapolis International Airport and San Francisco International Airport, on June 18, 2023, was operated by another airline. It arrived at gate D10. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA500.
UA2340 (MCO-SFO)
This United Airlines flight between Orlando International Airport and San Francisco International Airport, on June 17, 2023, was operated by another airline. It arrived at gate F20. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2340.
UA2123 (AUS-SFO)
This United Airlines flight between Austin-Bergstrom International Airport and San Francisco International Airport, on June 17, 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 UA2123.
UA2238 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on June 07, 2023, was operated by another airline. It arrived at gate F3. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2238.
UA1403 (CLE-SFO)
This United Airlines flight between Hopkins International Airport and San Francisco International Airport, on June 06, 2023, was operated by another airline. It arrived at gate F14. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1403.
UA2114 (FLL-SFO)
This United Airlines flight between Fort Lauderdale Hollywood International Airport and San Francisco International Airport, on June 06, 2023, was operated by another airline. It arrived at gate F2. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2114.
UA1778 (MCO-SFO)
This United Airlines flight between Orlando International Airport and San Francisco International Airport, on May 31, 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 UA1778.
UA1483 (LAS-SFO)
This United Airlines flight between McCarran International Airport and San Francisco International Airport, on May 31, 2023, was operated by another airline. It arrived at gate F3. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1483.
UA1724 (KOA-SFO)
This United Airlines flight between Kailua-Kona International Airport and San Francisco International Airport, on May 29, 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 UA1724.
UA1723 (SFO-KOA)
This United Airlines flight between San Francisco International Airport and Kailua-Kona International Airport, on May 28, 2023, was operated by another airline. It departed from gate E9. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1723.
UA1057 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on May 28, 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 UA1057.
UA1826 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on May 28, 2023, was operated by another airline. It departed from gate E13. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1826.