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.

UA1240 (PHX-SFO)
This United Airlines flight between Sky Harbor International Airport and San Francisco International Airport, on May 28, 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 UA1240.
UA762 (SFO-IAH)
This United Airlines flight between San Francisco International Airport and George Bush Intercontinental Airport, on May 26, 2023, 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 UA762.
UA1513 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on May 26, 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 UA1513.
UA1742 (IAD-SFO)
This United Airlines flight between Dulles International Airport and San Francisco International Airport, on May 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 UA1742.
UA2243 (SFO-IAD)
This United Airlines flight between San Francisco International Airport and Dulles International Airport, on May 21, 2023, was operated by another airline. It departed from gate E12. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA2243.
UA1057 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on May 20, 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 UA1057.
UA1826 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on May 20, 2023, was operated by another airline. It departed from gate F12. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1826.
UA2385 (IAH-SFO)
This United Airlines flight between George Bush Intercontinental Airport and San Francisco International Airport, on May 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 UA2385.
UA1396 (SFO-IAH)
This United Airlines flight between San Francisco International Airport and George Bush Intercontinental Airport, on May 19, 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 UA1396.
UA2200 (LAX-SFO)
This United Airlines flight between Los Angeles International Airport and San Francisco International Airport, on May 18, 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 UA2200.
UA1722 (SFO-IAD)
This United Airlines flight between San Francisco International Airport and Dulles International Airport, on May 16, 2023, was operated by another airline. It departed from gate F16. Passengers were flying aboard a Boeing 737-MAX 9 with tail number N37521. See all the flights for UA1722.
UA1761 (SAN-SFO)
This United Airlines flight between San Diego International Airport and San Francisco International Airport, on May 16, 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 UA1761.