AA 3734 then AA 1211 at O'Hare
Lansing → Chicago → Seattle (SEA)
Timetable, Chicago time
06:05AA 3734 from Lansing at the gate
17:25AA 1211 to Seattle (SEA) leaves the gate
11 h 20 apart on the timetable
The last days
AA 3734 and AA 1211 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.