DL 215 then KL 989 at Schiphol
Rome → Amsterdam → London City
Timetable, Amsterdam time
13:15DL 215 from Rome at the gate
16:30KL 989 to London City leaves the gate
3 h 15 apart on the timetable
The last days
DL 215 and KL 989 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.