CZ1251 (ATL-SFO) on December 23, 2019 This China Southern Airlines flight between Hartsfield-Jackson Atlanta International Airport and San Francisco International Airport, on December 23, 2019, was operated by Delta Air Lines flight DL2697 (ATL-SFO). It arrived at gate C2. See all the flights for CZ1251. / See all the flights for CZ1251