AS 421 then WN 2160 at Denver
Seattle → Denver → San Antonio
Timetable, Denver time
17:39AS 421 from Seattle at the gate
14:35WN 2160 to San Antonio leaves the gate
20 h 56 apart on the timetable, overnight
WN 2160 leaves 20 h 56 after AS 421 arrives on the timetable: more than half a day, so not a connection we count.