FR 2512 then FR 9015 at Barcelona
Cologne → Barcelona → London Stansted
Timetable, Barcelona time
08:30FR 2512 from Cologne at the gate
12:20FR 9015 to London Stansted leaves the gate
3 h 50 apart on the timetable
The last days
FR 2512 and FR 9015 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.