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.

UA1488 (LAX-SFO)
This United Airlines flight between Los Angeles International Airport and San Francisco International Airport, on July 23, 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 UA1488.
UA729 (PDX-SFO)
This United Airlines flight between Portland International Airport and San Francisco International Airport, on July 23, 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 UA729.
UA2669 (TPA-SFO)
This United Airlines flight between Tampa International Airport and San Francisco International Airport, on July 23, 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 UA2669.
UA1802 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on July 20, 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 UA1802.
UA1449 (YVR-SFO)
This United Airlines flight between Vancouver International Airport and San Francisco International Airport, on July 13, 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 UA1449.
UA2669 (TPA-SFO)
This United Airlines flight between Tampa International Airport and San Francisco International Airport, on July 13, 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 UA2669.
UA1187 (BOS-SFO)
This United Airlines flight between Gen E L Logan International Airport and San Francisco International Airport, on July 10, 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 UA1187.
UA673 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on July 05, 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 UA673.
UA2416 (LAS-SFO)
This United Airlines flight between McCarran International Airport and San Francisco International Airport, on July 04, 2023, was operated by another airline. It arrived at gate F21. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2416.
UA2357 (OMA-SFO)
This United Airlines flight between Eppley Airfield and San Francisco International Airport, on July 04, 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 UA2357.
UA1948 (CUN-SFO)
This United Airlines flight traveled from Cancun Airport to San Francisco International Airport, on July 03, 2023. It arrived at gate G3. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1948.
UA1403 (CLE-SFO)
This United Airlines flight between Hopkins International Airport and San Francisco International Airport, on June 18, 2023, was operated by another airline. It arrived at gate E3. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1403.