AA 1938 then 1I 605 at O'Hare
Dallas-Fort Worth → Chicago → St Louis
Timetable, Chicago time
07:35AA 1938 from Dallas-Fort Worth at the gate
11:301I 605 to St Louis leaves the gate
3 h 55 apart on the timetable
The last days
AA 1938 and 1I 605 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.