DL 932 then UA 609 at Atlanta
San Diego → Atlanta → Denver
Timetable, Atlanta time
20:07DL 932 from San Diego at the gate
16:39UA 609 to Denver leaves the gate
20 h 32 apart on the timetable, overnight
UA 609 leaves 20 h 32 after DL 932 arrives on the timetable: more than half a day, so not a connection we count.