AA 1567 then DL 2121 at DFW
Atlanta → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
08:50AA 1567 from Atlanta at the gate
13:10DL 2121 to Boston leaves the gate
4 h 20 apart on the timetable
The last days
AA 1567 and DL 2121 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.