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.

UA2681 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on August 15, 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 UA2681.
UA214 (HNL-SFO)
This United Airlines flight between Honolulu International Airport and San Francisco International Airport, on August 11, 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 UA214.
UA1066 (YYC-SFO)
This United Airlines flight between Calgary International Airport and San Francisco International Airport, on August 10, 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 UA1066.
UA2669 (TPA-SFO)
This United Airlines flight between Tampa International Airport and San Francisco International Airport, on August 10, 2023, was operated by another airline. It arrived at gate E4. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2669.
UA1488 (LAX-SFO)
This United Airlines flight between Los Angeles International Airport and San Francisco International Airport, on August 08, 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 UA1488.
UA2366 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on August 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 UA2366.
UA2238 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on August 01, 2023, was operated by another airline. It arrived at gate E5. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2238.
UA2238 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on July 30, 2023, was operated by another airline. It arrived at gate F19. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2238.
UA470 (MCO-SFO)
This United Airlines flight between Orlando International Airport and San Francisco International Airport, on July 30, 2023, was operated by another airline. It arrived at gate E8. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA470.
UA1488 (LAX-SFO)
This United Airlines flight between Los Angeles International Airport and San Francisco International Airport, on July 29, 2023, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1488.
UA1187 (BOS-SFO)
This United Airlines flight between Gen E L Logan International Airport and San Francisco International Airport, on July 27, 2023, was operated by another airline. It arrived at gate E7. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1187.
UA2220 (MIA-SFO)
This United Airlines flight between Miami International Airport and San Francisco International Airport, on July 24, 2023, was operated by another airline. It arrived at gate E4. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2220.