UA 1852 then AA 6305 at DFW
San Francisco → Dallas-Fort Worth → South Bend
Timetable, Dallas-Fort Worth time
05:34UA 1852 from San Francisco at the gate
17:35AA 6305 to South Bend leaves the gate
12 h 01 apart on the timetable
AA 6305 leaves 12 h 01 after UA 1852 arrives on the timetable: more than half a day, so not a connection we count.