AA 4912 then AA 6438 at LAX
St Louis → Los Angeles → Seattle (SEA)
Timetable, Los Angeles time
10:37AA 4912 from St Louis at the gate
12:20AA 6438 to Seattle (SEA) leaves the gate
1 h 43 apart on the timetable
The last days
AA 4912 and AA 6438 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.