UA 751 then QR 7784 at San Francisco
Portland (Oregon) → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
15:15UA 751 from Portland (Oregon) at the gatealso CM 1419, AC 3338, VA 8585, NZ 9358
13:57QR 7784 to Dallas-Fort Worth leaves the gate
22 h 42 apart on the timetable, overnight
QR 7784 leaves 22 h 42 after UA 751 arrives on the timetable: more than half a day, so not a connection we count.