FR 7156 then U2 8018 at Madrid
Dublin → Madrid → London Gatwick
Timetable, Madrid time
12:45FR 7156 from Dublin at the gate
13:40U2 8018 to London Gatwick leaves the gate
55 min apart on the timetable
The last days
FR 7156 and U2 8018 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.