A3 710 then AT 910 at Barcelona
Athens → Barcelona → Istanbul
Timetable, Barcelona time
10:25A3 710 from Athens at the gate
14:55AT 910 to Istanbul leaves the gate
4 h 30 apart on the timetable
The last days
A3 710 and AT 910 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.