DL 2804 then AA 2626 at O'Hare
Boston → Chicago → Denver
Timetable, Chicago time
22:36DL 2804 from Boston at the gate
22:35AA 2626 to Denver leaves the gate
23 h 59 apart on the timetable, overnight
AA 2626 leaves 23 h 59 after DL 2804 arrives on the timetable: more than half a day, so not a connection we count.