AY 1726 then AY 1339 at Helsinki
Alicante → Helsinki → London Heathrow
Timetable, Helsinki time
20:10AY 1726 from Alicante at the gate
19:35AY 1339 to London Heathrow leaves the gate
23 h 25 apart on the timetable, overnight
AY 1339 leaves 23 h 25 after AY 1726 arrives on the timetable: more than half a day, so not a connection we count.