AA 3381 then UA 2263 at O'Hare
Huntsville → Chicago → Seattle (SEA)
Timetable, Chicago time
08:26AA 3381 from Huntsville at the gate
20:33UA 2263 to Seattle (SEA) leaves the gate
12 h 07 apart on the timetable
UA 2263 leaves 12 h 07 after AA 3381 arrives on the timetable: more than half a day, so not a connection we count.