AA 939 then AA 3102 at DFW
San Francisco → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
05:00AA 939 from San Francisco at the gate
09:40AA 3102 to Boston leaves the gate
4 h 40 apart on the timetable
The last days
AA 939 and AA 3102 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.