FR 339 then FR 2703 at Dublin
London Luton → Dublin → Seville
Timetable, Dublin time
20:30FR 339 from London Luton at the gate
14:10FR 2703 to Seville leaves the gate
17 h 40 apart on the timetable, overnight
FR 2703 leaves 17 h 40 after FR 339 arrives on the timetable: more than half a day, so not a connection we count.