FI 568 then BA 719 at Zurich
Reykjavík → Zurich → London Heathrow
Timetable, Zurich time
12:05FI 568 from Reykjavík at the gate
17:40BA 719 to London Heathrow leaves the gate
5 h 35 apart on the timetable
The last days
FI 568 and BA 719 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.