EC 3749 then LL 5053 at Barcelona
Milan → Barcelona → Hondarribia
Timetable, Barcelona time
21:30EC 3749 from Milan at the gate
12:20LL 5053 to Hondarribia leaves the gate
14 h 50 apart on the timetable, overnight
LL 5053 leaves 14 h 50 after EC 3749 arrives on the timetable: more than half a day, so not a connection we count.