2W 3410 then AA 8727 at Madrid
Santo Domingo → Madrid → Barcelona
Timetable, Madrid time
12:252W 3410 from Santo Domingo at the gate
19:10AA 8727 to Barcelona leaves the gate
6 h 45 apart on the timetable
The last days
2W 3410 and AA 8727 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.