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.

UA1074 (SAT-SFO)
This United Airlines flight between San Antonio International Airport and San Francisco International Airport, on November 10, 2023, was operated by another airline. It arrived at gate E5. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1074.
UA1986 (SFO-SEA)
This United Airlines flight between San Francisco International Airport and Tacoma International Airport, on November 07, 2023, was operated by another airline. It departed from gate F3A. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1986.
UA2480 (SNA-SFO)
This United Airlines flight between John Wayne Airport and San Francisco International Airport, on November 07, 2023, was operated by another airline. It arrived at gate F3A. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2480.
UA2047 (SFO-SNA)
This United Airlines flight between San Francisco International Airport and John Wayne Airport, on November 06, 2023, was operated by another airline. It departed from gate F4. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2047.
UA1243 (PVR-SFO)
This United Airlines flight between Lic Gustavo Diaz Ordaz International Airport and San Francisco International Airport, on November 06, 2023, was operated by another airline. It arrived at gate G2. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1243.
UA1263 (SFO-CMH)
This United Airlines flight traveled from San Francisco International Airport to Port Columbus International Airport, on September 19, 2023. It departed from gate F4. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1263.
UA1597 (LAX-SFO)
This United Airlines flight between Los Angeles International Airport and San Francisco International Airport, on September 18, 2023, was operated by another airline. It arrived at gate F4. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1597.
UA1201 (SFO-PHX)
This United Airlines flight between San Francisco International Airport and Sky Harbor International Airport, on September 18, 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 UA1201.
UA1739 (MFR-SFO)
This United Airlines flight between Rogue Valley International-Medford Airport and San Francisco International Airport, on September 18, 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 UA1739.
UA788 (SFO-EUG)
This United Airlines flight between San Francisco International Airport and Eugene Airport-Mahlon Sweet Field, on September 14, 2023, was operated by another airline. It departed from gate F4. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA788.
UA2480 (SNA-SFO)
This United Airlines flight between John Wayne Airport and San Francisco International Airport, on September 14, 2023, was operated by another airline. It arrived at gate F4. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2480.
UA2047 (SFO-SNA)
This United Airlines flight between San Francisco International Airport and John Wayne Airport, on September 13, 2023, was operated by another airline. It departed from gate G6. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2047.