UA 561 then WN 2989 at San Francisco
Kansas City → San Francisco → St Louis
Timetable, San Francisco time
20:10UA 561 from Kansas City at the gatealso OZ 6318, NZ 9502
13:05WN 2989 to St Louis leaves the gate
16 h 55 apart on the timetable, overnight
WN 2989 leaves 16 h 55 after UA 561 arrives on the timetable: more than half a day, so not a connection we count.