AA 3770 then DL 2057 at DFW
Grand Junction → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
10:14AA 3770 from Grand Junction at the gate
17:25DL 2057 to Boston leaves the gate
7 h 11 apart on the timetable
The last days
AA 3770 and DL 2057 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.