U2 8515 then DJ 6645 at Lisbon
London Gatwick → Lisbon → Porto
Timetable, Lisbon time
13:30U2 8515 from London Gatwick at the gate
19:48DJ 6645 to Porto leaves the gate
6 h 18 apart on the timetable
The last days
U2 8515 and DJ 6645 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.