AA 9782 then DL 1940 at O'Hare
Boston → Chicago → Salt Lake City
Timetable, Chicago time
13:14AA 9782 from Boston at the gate
14:03DL 1940 to Salt Lake City leaves the gate
49 min apart on the timetable
The last days
AA 9782 and DL 1940 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.