UA 5588 then B6 188 at LAX
Fresno → Los Angeles → Boston
Timetable, Los Angeles time
07:27UA 5588 from Fresno at the gate
20:30B6 188 to Boston leaves the gate
13 h 03 apart on the timetable
B6 188 leaves 13 h 03 after UA 5588 arrives on the timetable: more than half a day, so not a connection we count.