EI 3321 then BA 827 at Dublin
Manchester → Dublin → London Heathrow
Timetable, Dublin time
10:40EI 3321 from Manchester at the gate
15:10BA 827 to London Heathrow leaves the gate
4 h 30 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
EI 3321 and BA 827 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.