U2 9888 then U2 2518 at Schiphol
Lanzarote → Amsterdam → London Luton
Timetable, Amsterdam time
13:20U2 9888 from Lanzarote at the gate
15:35U2 2518 to London Luton leaves the gate
2 h 15 apart on the timetable
The last days
U2 9888 and U2 2518 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.