AA 6291 then AS 9990 at LAX
Tucson → Los Angeles → Seattle (SEA)
Timetable, Los Angeles time
08:53AA 6291 from Tucson at the gate
17:00AS 9990 to Seattle (SEA) leaves the gate
8 h 07 apart on the timetable
The last days
AA 6291 and AS 9990 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.