UA 2051 then MX 229 at San Francisco
Kansas City → San Francisco → Louisville
Timetable, San Francisco time
09:04UA 2051 from Kansas City at the gatealso NZ 9504
06:30MX 229 to Louisville leaves the gate
21 h 26 apart on the timetable, overnight
MX 229 leaves 21 h 26 after UA 2051 arrives on the timetable: more than half a day, so not a connection we count.