F9 4346 then UA 779 at Denver
Los Angeles → Denver → Boston
Timetable, Denver time
17:35F9 4346 from Los Angeles at the gate
15:40UA 779 to Boston leaves the gate
22 h 05 apart on the timetable, overnight
UA 779 leaves 22 h 05 after F9 4346 arrives on the timetable: more than half a day, so not a connection we count.