DL 1697 then UA 639 at Boston
Phoenix → Boston → Los Angeles
Timetable, Boston time
21:00DL 1697 from Phoenix at the gate
17:59UA 639 to Los Angeles leaves the gate
20 h 59 apart on the timetable, overnight
UA 639 leaves 20 h 59 after DL 1697 arrives on the timetable: more than half a day, so not a connection we count.