AA 1509 then GF 4115 at O'Hare
Boston → Chicago → Dallas-Fort Worth
Timetable, Chicago time
09:05AA 1509 from Boston at the gate
10:00GF 4115 to Dallas-Fort Worth leaves the gate
55 min apart on the timetable
The last days
AA 1509 and GF 4115 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.