FR 612 then FR 5203 at Dublin
Killarney → Dublin → Sofia
Timetable, Dublin time
18:30FR 612 from Killarney at the gate
17:00FR 5203 to Sofia leaves the gate
22 h 30 apart on the timetable, overnight
FR 5203 leaves 22 h 30 after FR 612 arrives on the timetable: more than half a day, so not a connection we count.