AS 727 then WN 1572 at Atlanta
Seattle → Atlanta → Denver
Timetable, Atlanta time
06:22AS 727 from Seattle at the gate
18:40WN 1572 to Denver leaves the gate
12 h 18 apart on the timetable
WN 1572 leaves 12 h 18 after AS 727 arrives on the timetable: more than half a day, so not a connection we count.