AY 9 then AA 2548 at O'Hare
Helsinki → Chicago → Philadelphia
Timetable, Chicago time
18:45AY 9 from Helsinki at the gate
19:29AA 2548 to Philadelphia leaves the gate
44 min apart on the timetable
The last days
AY 9 and AA 2548 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.