DL 3876 then UA 2656 at Denver
Austin → Denver → Boston
Timetable, Denver time
09:02DL 3876 from Austin at the gate
23:59UA 2656 to Boston leaves the gate
14 h 57 apart on the timetable
UA 2656 leaves 14 h 57 after DL 3876 arrives on the timetable: more than half a day, so not a connection we count.