AA 3547 then DL 9884 at O'Hare
St Louis → Chicago → Seattle (SEA)
Timetable, Chicago time
21:51AA 3547 from St Louis at the gate
08:30DL 9884 to Seattle (SEA) leaves the gate
10 h 39 apart on the timetable, overnight
The last days
AA 3547 and DL 9884 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.