W9 5379 then U2 7694 at Barcelona
London Luton → Barcelona → Lisbon
Timetable, Barcelona time
11:55W9 5379 from London Luton at the gate
15:30U2 7694 to Lisbon leaves the gate
3 h 35 apart on the timetable
The last days
W9 5379 and U2 7694 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.