TK 6019 then UA 1580 at O'Hare
Istanbul → Chicago → Boston
Timetable, Chicago time
03:15TK 6019 from Istanbul at the gate
12:46UA 1580 to Boston leaves the gate
9 h 31 apart on the timetable
The last days
TK 6019 and UA 1580 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.