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.

UA1243 (PVR-SFO)
This United Airlines flight between Lic Gustavo Diaz Ordaz International Airport and San Francisco International Airport, on January 02, 2023, was operated by another airline. It arrived at gate G5. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1243.
UA2652 (SEA-SFO)
This United Airlines flight between Tacoma International Airport and San Francisco International Airport, on December 04, 2022, 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 UA2652.
UA447 (SFO-SEA)
This United Airlines flight between San Francisco International Airport and Tacoma International Airport, on December 03, 2022, was operated by another airline. It departed from gate G3. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA447.
UA1881 (SFO-SJD)
This United Airlines flight between San Francisco International Airport and Los Cabos International Airport, on September 25, 2022, was operated by another airline. It departed from gate F2. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1881.
UA390 (SNA-SFO)
This United Airlines flight between John Wayne Airport and San Francisco International Airport, on September 25, 2022, was operated by another airline. It arrived at gate F2. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA390.
UA1823 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on September 01, 2022, 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 UA1823.
UA1723 (SBA-SFO)
This United Airlines flight between Santa Barbara Municipal Airport and San Francisco International Airport, on September 01, 2022, 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 UA1723.
UA1189 (SFO-SJD)
This United Airlines flight between San Francisco International Airport and Los Cabos International Airport, on August 10, 2022, was operated by another airline. It departed from gate G3. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1189.
UA2235 (SAN-SFO)
This United Airlines flight between San Diego International Airport and San Francisco International Airport, on August 10, 2022, was operated by another airline. It arrived at gate G3. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA2235.
UA1823 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on August 07, 2022, was operated by another airline. It departed from gate E10. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1823.
UA1723 (SBA-SFO)
This United Airlines flight between Santa Barbara Municipal Airport and San Francisco International Airport, on August 07, 2022, was operated by another airline. It arrived at gate E10. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1723.
UA1544 (SFO-DEN)
This United Airlines flight between San Francisco International Airport and Denver International Airport, on August 07, 2022, was operated by another airline. It departed from gate F12. Passengers were flying aboard an Airbus A320-200 with tail number N421UA. See all the flights for UA1544.