EK 6107 then UA 2356 at San Francisco
Houston → San Francisco → Boston
Timetable, San Francisco time
10:46EK 6107 from Houston at the gatealso CA 7372
10:40UA 2356 to Boston leaves the gatealso VA 8309, NZ 9015
23 h 54 apart on the timetable, overnight
UA 2356 leaves 23 h 54 after EK 6107 arrives on the timetable: more than half a day, so not a connection we count.