DM 2002 then UA 503 at Boston
Santo Domingo → Boston → Chicago O'Hare
Timetable, Boston time
09:45DM 2002 from Santo Domingo at the gate
10:25UA 503 to Chicago O'Hare leaves the gate
40 min apart on the timetable
Boston’s board gives an arrival time for only about 59% of its flights, so many days show no gate time.
The last days
DM 2002 and UA 503 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.