AA 1849 then AA 766 at DFW
San Francisco → Dallas-Fort Worth → Tucson
Timetable, Dallas-Fort Worth time
18:23AA 1849 from San Francisco at the gate
17:42AA 766 to Tucson leaves the gate
23 h 19 apart on the timetable, overnight
AA 766 leaves 23 h 19 after AA 1849 arrives on the timetable: more than half a day, so not a connection we count.