LL 5501 then FR 8003 at Barcelona
Vigo → Barcelona → Porto
Timetable, Barcelona time
01:40LL 5501 from Vigo at the gate
11:40FR 8003 to Porto leaves the gate
10 h apart on the timetable
The last days
LL 5501 and FR 8003 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.