OO 9908 then OO 435 at O'Hare
Milwaukee → Chicago → Oklahoma City
Timetable, Chicago time
07:46OO 9908 from Milwaukee at the gate
13:30OO 435 to Oklahoma City leaves the gate
5 h 44 apart on the timetable
The last days
OO 9908 and OO 435 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.