DL 100 then IB 1149 at Madrid
Atlanta → Madrid → Porto
Timetable, Madrid time
11:10DL 100 from Atlanta at the gate
11:25IB 1149 to Porto leaves the gatealso CX 1922, AY 4791, VY 5752
15 min apart on the timetable
The last days
DL 100 and IB 1149 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.