DL 335 then WN 1422 at Detroit
San Francisco → Detroit → Denver
Timetable, Detroit time
06:08DL 335 from San Francisco at the gate
18:15WN 1422 to Denver leaves the gate
12 h 07 apart on the timetable
WN 1422 leaves 12 h 07 after DL 335 arrives on the timetable: more than half a day, so not a connection we count.