IB 136 then AA 8844 at Madrid
Quito → Madrid → London Heathrow
Timetable, Madrid time
10:45IB 136 from Quito at the gate
17:20AA 8844 to London Heathrow leaves the gate
6 h 35 apart on the timetable
The last days
IB 136 and AA 8844 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.