FR 3881 then EI 168 at Dublin
Dubrovnik → Dublin → London Heathrow
Timetable, Dublin time
23:05FR 3881 from Dubrovnik at the gate
14:15EI 168 to London Heathrow leaves the gate
15 h 10 apart on the timetable, overnight
EI 168 leaves 15 h 10 after FR 3881 arrives on the timetable: more than half a day, so not a connection we count.