FR 339 then FR 7139 at Dublin
London Luton → Dublin → Vilnius
Timetable, Dublin time
20:30FR 339 from London Luton at the gate
18:00FR 7139 to Vilnius leaves the gate
21 h 30 apart on the timetable, overnight
FR 7139 leaves 21 h 30 after FR 339 arrives on the timetable: more than half a day, so not a connection we count.