IB 987 then U2 2141 at Manchester
Madrid → Manchester → Dalaman
Timetable, Manchester time
13:55IB 987 from Madrid at the gate
14:50U2 2141 to Dalaman leaves the gate
55 min apart on the timetable
The last days
IB 987 and U2 2141 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.