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.

UA1823 (SFO-IAH)
This United Airlines flight between San Francisco International Airport and George Bush Intercontinental Airport, on March 21, 2024, was operated by another airline. It departed from gate E4. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1823.
UA574 (LAS-SFO)
This United Airlines flight between McCarran International Airport and San Francisco International Airport, on March 21, 2024, 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 UA574.
UA2385 (SFO-SAN)
This United Airlines flight between San Francisco International Airport and San Diego International Airport, on March 01, 2024, was operated by another airline. It departed from gate E5. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2385.
UA2142 (LAS-SFO)
This United Airlines flight between McCarran International Airport and San Francisco International Airport, on March 01, 2024, 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 UA2142.
UA1929 (MCO-SFO)
This United Airlines flight between Orlando International Airport and San Francisco International Airport, on November 24, 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 UA1929.
UA2027 (SFO-MCO)
This United Airlines flight between San Francisco International Airport and Orlando International Airport, on November 24, 2023, was operated by another airline. It departed from gate E5. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2027.
UA1561 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on November 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 UA1561.
UA513 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on November 23, 2023, was operated by another airline. It departed from gate E7. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA513.
UA1929 (MCO-SFO)
This United Airlines flight between Orlando International Airport and San Francisco International Airport, on November 22, 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 UA1929.
UA2366 (SFO-LAS)
This United Airlines flight between San Francisco International Airport and McCarran International Airport, on November 21, 2023, was operated by another airline. It departed from gate E5. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2366.
UA2158 (FLL-SFO)
This United Airlines flight between Fort Lauderdale Hollywood International Airport and San Francisco International Airport, on November 21, 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 UA2158.
UA1937 (SFO-FLL)
This United Airlines flight between San Francisco International Airport and Fort Lauderdale Hollywood International Airport, on November 21, 2023, was operated by another airline. It departed from gate F21. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1937.