UA 1818 then DL 437 at LAX
Tampa → Los Angeles → Boston
Timetable, Los Angeles time
11:30UA 1818 from Tampa at the gate
10:59DL 437 to Boston leaves the gate
23 h 29 apart on the timetable, overnight
DL 437 leaves 23 h 29 after UA 1818 arrives on the timetable: more than half a day, so not a connection we count.