DL 2889 then AS 704 at Seattle
Boston → Seattle → Las Vegas
Timetable, Seattle time
22:05DL 2889 from Boston at the gate
20:05AS 704 to Las Vegas leaves the gate
22 h apart on the timetable, overnight
AS 704 leaves 22 h after DL 2889 arrives on the timetable: more than half a day, so not a connection we count.