B6 1488 then UA 1015 at Boston
Los Angeles → Boston → Chicago O'Hare
Timetable, Boston time
06:30B6 1488 from Los Angeles at the gate
18:36UA 1015 to Chicago O'Hare leaves the gate
12 h 06 apart on the timetable
UA 1015 leaves 12 h 06 after B6 1488 arrives on the timetable: more than half a day, so not a connection we count.