AS 727 then UA 2376 at Atlanta
Seattle → Atlanta → Houston
Timetable, Atlanta time
06:22AS 727 from Seattle at the gate
18:56UA 2376 to Houston leaves the gate
12 h 34 apart on the timetable
UA 2376 leaves 12 h 34 after AS 727 arrives on the timetable: more than half a day, so not a connection we count.