DL 2804 then AY 10 at O'Hare
Boston → Chicago → Helsinki
Timetable, Chicago time
22:36DL 2804 from Boston at the gate
22:25AY 10 to Helsinki leaves the gate
23 h 49 apart on the timetable, overnight
AY 10 leaves 23 h 49 after DL 2804 arrives on the timetable: more than half a day, so not a connection we count.