AA 644 then AA 573 at DFW
Salt Lake City → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
10:45AA 644 from Salt Lake City at the gate
17:44AA 573 to Boston leaves the gate
6 h 59 apart on the timetable
The last days
AA 644 and AA 573 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.