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.

UA1723 (SFO-KOA)
This United Airlines flight between San Francisco International Airport and Kailua-Kona International Airport, on November 20, 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 UA1723.
UA574 (LAS-SFO)
This United Airlines flight between McCarran International Airport and San Francisco International Airport, on November 20, 2023, was operated by another airline. It arrived at gate E13. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA574.
UA2382 (SFO-LAX)
This United Airlines flight between San Francisco International Airport and Los Angeles International Airport, on November 20, 2023, was operated by another airline. It departed from gate F17. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2382.
UA1724 (KOA-SFO)
This United Airlines flight between Kailua-Kona International Airport and San Francisco International Airport, on November 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 UA1724.
UA1769 (RDU-SFO)
This United Airlines flight between Durham International Airport and San Francisco International Airport, on November 19, 2023, was operated by another airline. It arrived at gate F17. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1769.
UA1672 (SFO-IAH)
This United Airlines flight between San Francisco International Airport and George Bush Intercontinental Airport, on November 13, 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 UA1672.
UA1240 (SEA-SFO)
This United Airlines flight between Tacoma International Airport and San Francisco International Airport, on November 13, 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 UA1240.
UA1971 (SFO-SEA)
This United Airlines flight between San Francisco International Airport and Tacoma International Airport, on November 12, 2023, was operated by another airline. It departed from gate G8. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1971.
UA2123 (AUS-SFO)
This United Airlines flight between Austin-Bergstrom International Airport and San Francisco International Airport, on November 11, 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 UA2123.
UA2070 (SFO-AUS)
This United Airlines flight between San Francisco International Airport and Austin-Bergstrom International Airport, on November 10, 2023, was operated by another airline. It departed from gate F17. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2070.
UA1435 (SFO-IAH)
This United Airlines flight between San Francisco International Airport and George Bush Intercontinental Airport, on October 25, 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 UA1435.
UA574 (LAS-SFO)
This United Airlines flight between McCarran International Airport and San Francisco International Airport, on October 25, 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 UA574.