Flights for the airplane with tail number N421UA 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.

UA718 (MEX-SFO)
This United Airlines flight between Benito Juarez International Airport and San Francisco International Airport, on February 20, 2023, was operated by another airline. It arrived at gate G12. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA718.
UA1483 (SFO-ABQ)
This United Airlines flight between San Francisco International Airport and Albuquerque International Airport, on February 16, 2023, was operated by another airline. It departed from gate F1. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1483.
UA1763 (MCI-SFO)
This United Airlines flight between Kansas City International Airport and San Francisco International Airport, on February 16, 2023, was operated by another airline. It arrived at gate F1. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1763.
UA2117 (SFO-MCI)
This United Airlines flight between San Francisco International Airport and Kansas City International Airport, on February 15, 2023, was operated by another airline. It departed from gate G12. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2117.
UA1243 (PVR-SFO)
This United Airlines flight between Lic Gustavo Diaz Ordaz International Airport and San Francisco International Airport, on February 15, 2023, was operated by another airline. It arrived at gate G12. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1243.
UA1212 (SFO-PVR)
This United Airlines flight between San Francisco International Airport and Lic Gustavo Diaz Ordaz International Airport, on February 01, 2023, was operated by another airline. It departed from gate E7. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1212.
UA718 (MEX-SFO)
This United Airlines flight between Benito Juarez International Airport and San Francisco International Airport, on January 31, 2023, was operated by another airline. It arrived at gate G12. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA718.
UA412 (SFO-MEX)
This United Airlines flight between San Francisco International Airport and Benito Juarez International Airport, on January 09, 2023, was operated by another airline. It departed from gate F3. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA412.
UA2236 (ABQ-SFO)
This United Airlines flight between Albuquerque International Airport and San Francisco International Airport, on January 09, 2023, was operated by another airline. It arrived at gate F1. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2236.
UA2173 (SFO-ABQ)
This United Airlines flight between San Francisco International Airport and Albuquerque International Airport, on January 09, 2023, was operated by another airline. It departed from gate F20. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2173.
UA1672 (DEN-SFO)
This United Airlines flight between Denver International Airport and San Francisco International Airport, on January 09, 2023, was operated by another airline. It arrived at gate F20. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1672.
UA2169 (SFO-PHX)
This United Airlines flight between San Francisco International Airport and Sky Harbor International Airport, on January 02, 2023, was operated by another airline. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2169.