UA 1938 then AA 2439 at Phoenix
Washington → Phoenix → San Diego
Timetable, Phoenix time
21:04UA 1938 from Washington at the gate
20:38AA 2439 to San Diego leaves the gate
23 h 34 apart on the timetable, overnight
AA 2439 leaves 23 h 34 after UA 1938 arrives on the timetable: more than half a day, so not a connection we count.