UA 367 then UA 301 at San Francisco
Washington → San Francisco → Denver
Timetable, San Francisco time
01:29UA 367 from Washington at the gatealso LH 7530, VA 8388, NZ 9181
21:24UA 301 to Denver leaves the gatealso AC 3598, VA 8346, NZ 9055
19 h 55 apart on the timetable
UA 301 leaves 19 h 55 after UA 367 arrives on the timetable: more than half a day, so not a connection we count.