FR 9986 then FR 5151 at Dublin
Porto → Dublin → Glasgow
Timetable, Dublin time
10:15FR 9986 from Porto at the gate
14:30FR 5151 to Glasgow leaves the gate
4 h 15 apart on the timetable
Dublin’s board gives an arrival time for only about 47% of its flights, so many days show no gate time.
The last days
FR 9986 and FR 5151 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.