DL 2804 then AA 3817 at O'Hare
Boston → Chicago → Rochester (RST)
Timetable, Chicago time
22:36DL 2804 from Boston at the gate
22:35AA 3817 to Rochester (RST) leaves the gate
23 h 59 apart on the timetable, overnight
AA 3817 leaves 23 h 59 after DL 2804 arrives on the timetable: more than half a day, so not a connection we count.