BA 474 then QR 3600 at Barcelona
London Heathrow → Barcelona → Mahón
Timetable, Barcelona time
10:40BA 474 from London Heathrow at the gatealso IB 3657, AA 6813, QR 8340, VY 9552
07:45QR 3600 to Mahón leaves the gatealso VY 3602, IB 5269
21 h 05 apart on the timetable, overnight
QR 3600 leaves 21 h 05 after BA 474 arrives on the timetable: more than half a day, so not a connection we count.