UA 2106 then UA 1007 at San Francisco
Chicago O'Hare → San Francisco → Seattle
Timetable, San Francisco time
00:53UA 2106 from Chicago O'Hare at the gatealso AC 4373, LH 8778, NZ 9329
21:05UA 1007 to Seattle leaves the gatealso CM 2320, LX 3347, VA 8286
20 h 12 apart on the timetable
UA 1007 leaves 20 h 12 after UA 2106 arrives on the timetable: more than half a day, so not a connection we count.