UA 5588 then DL 521 at LAX
Fresno → Los Angeles → Dallas-Fort Worth
Timetable, Los Angeles time
09:26UA 5588 from Fresno at the gate
09:15DL 521 to Dallas-Fort Worth leaves the gate
23 h 49 apart on the timetable, overnight
DL 521 leaves 23 h 49 after UA 5588 arrives on the timetable: more than half a day, so not a connection we count.