WN 4187 then AA 2602 at Phoenix
St Louis → Phoenix → Boston
Timetable, Phoenix time
14:35WN 4187 from St Louis at the gate
13:56AA 2602 to Boston leaves the gate
23 h 21 apart on the timetable, overnight
AA 2602 leaves 23 h 21 after WN 4187 arrives on the timetable: more than half a day, so not a connection we count.