3S 440 then OO 301 at O'Hare
Frankfurt am Main → Chicago → Milwaukee
Timetable, Chicago time
18:123S 440 from Frankfurt am Main at the gate
20:19OO 301 to Milwaukee leaves the gate
2 h 07 apart on the timetable
The last days
3S 440 and OO 301 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.