UA 2304 then B6 1323 at Boston
Chicago O'Hare → Boston → Santiago (Dominican Republic)
Timetable, Boston time
19:14UA 2304 from Chicago O'Hare at the gate
18:55B6 1323 to Santiago (Dominican Republic) leaves the gate
23 h 41 apart on the timetable, overnight
B6 1323 leaves 23 h 41 after UA 2304 arrives on the timetable: more than half a day, so not a connection we count.