FR 3977 then FR 2402 at Barcelona
Dublin → Barcelona → Seville
Timetable, Barcelona time
22:55FR 3977 from Dublin at the gate
06:10FR 2402 to Seville leaves the gate
7 h 15 apart on the timetable, overnight
The last days
FR 3977 and FR 2402 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.