WN 4712 then AA 2453 at LAX
St Louis → Los Angeles → Boston
Timetable, Los Angeles time
23:55WN 4712 from St Louis at the gate
23:20AA 2453 to Boston leaves the gate
23 h 25 apart on the timetable, overnight
AA 2453 leaves 23 h 25 after WN 4712 arrives on the timetable: more than half a day, so not a connection we count.