Flights for UA2121 These are not all the flights that UA2121 has taken, just some of them that have flown in or out of SFO

UA2121 (ORD-SFO)
This United Airlines flight between Chicago O'Hare International Airport and San Francisco International Airport, on August 24, 2022, was operated by another airline. It arrived at gate E11. Passengers were flying aboard a Boeing 737-900 with tail number N69840. See all the flights for UA2121.
UA2121 (SFO-RNO)
This United Airlines flight between San Francisco International Airport and Reno-Tahoe International Airport, on August 23, 2022, was operated by another airline. It departed from gate E9. Passengers were flying aboard an Airbus A319 with tail number N837UA. See all the flights for UA2121.
UA2121 (ORD-SFO)
This United Airlines flight between Chicago O'Hare International Airport and San Francisco International Airport, on August 23, 2022, was operated by another airline. It arrived at gate F13. Passengers were flying aboard a Boeing 737-900 with tail number N63899. See all the flights for UA2121.
UA2121 (SFO-RNO)
This United Airlines flight between San Francisco International Airport and Reno-Tahoe International Airport, on August 22, 2022, was operated by another airline. It departed from gate F3A. Passengers were flying aboard an Airbus A319 with tail number N844UA. See all the flights for UA2121.
UA2121 (ORD-SFO)
This United Airlines flight between Chicago O'Hare International Airport and San Francisco International Airport, on August 22, 2022, was operated by another airline. It arrived at gate E4. Passengers were flying aboard a Boeing 737-900 with tail number N37427. See all the flights for UA2121.
UA2121 (SFO-RNO)
This United Airlines flight between San Francisco International Airport and Reno-Tahoe International Airport, on August 21, 2022, was operated by another airline. It departed from gate F1. Passengers were flying aboard an Airbus A319 with tail number N881UA. See all the flights for UA2121.
UA2121 (ORD-SFO)
This United Airlines flight between Chicago O'Hare International Airport and San Francisco International Airport, on August 21, 2022, was operated by another airline. It arrived at gate F16. Passengers were flying aboard a Boeing 737-900 with tail number N69816. See all the flights for UA2121.
UA2121 (SFO-RNO)
This United Airlines flight between San Francisco International Airport and Reno-Tahoe International Airport, on August 20, 2022, was operated by another airline. It departed from gate F2. Passengers were flying aboard an Airbus A319 with tail number N813UA. See all the flights for UA2121.
UA2121 (ORD-SFO)
This United Airlines flight between Chicago O'Hare International Airport and San Francisco International Airport, on August 20, 2022, was operated by another airline. It arrived at gate F17. Passengers were flying aboard a Boeing 737-900 with tail number N66841. See all the flights for UA2121.
UA2121 (SFO-RNO)
This United Airlines flight between San Francisco International Airport and Reno-Tahoe International Airport, on August 19, 2022, was operated by another airline. It departed from gate F1. Passengers were flying aboard an Airbus A320-200 with tail number N418UA. See all the flights for UA2121.
UA2121 (ORD-SFO)
This United Airlines flight between Chicago O'Hare International Airport and San Francisco International Airport, on August 19, 2022, was operated by another airline. It arrived at gate E7. Passengers were flying aboard a Boeing 737-900 with tail number N28457. See all the flights for UA2121.
UA2121 (SFO-RNO)
This United Airlines flight between San Francisco International Airport and Reno-Tahoe International Airport, on August 18, 2022, was operated by another airline. It departed from gate F16. Passengers were flying aboard an Airbus A319 with tail number N830UA. See all the flights for UA2121.