AA 2120 then UA 2464 at San Francisco
Dallas-Fort Worth → San Francisco → Reno
Timetable, San Francisco time
08:56AA 2120 from Dallas-Fort Worth at the gatealso IB 8018
21:04UA 2464 to Reno leaves the gate
12 h 08 apart on the timetable
UA 2464 leaves 12 h 08 after AA 2120 arrives on the timetable: more than half a day, so not a connection we count.