QR 2183 then UA 1593 at San Francisco
Los Angeles → San Francisco → Houston
Timetable, San Francisco time
23:27QR 2183 from Los Angeles at the gatealso BA 6449
23:15UA 1593 to Houston leaves the gatealso EK 6028, NZ 9192
23 h 48 apart on the timetable, overnight
UA 1593 leaves 23 h 48 after QR 2183 arrives on the timetable: more than half a day, so not a connection we count.