DL 154 then BA 837 at Dublin
Boston → Dublin → London Heathrow
Timetable, Dublin time
09:45DL 154 from Boston at the gate
19:25BA 837 to London Heathrow leaves the gate
9 h 40 apart on the timetable
Dublin’s board gives an arrival time for only about 46% of its flights, so many days show no gate time.
The last days
DL 154 and BA 837 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.