AI 173 then UA 785 at San Francisco
New Delhi → San Francisco → Washington
Timetable, San Francisco time
07:00AI 173 from New Delhi at the gate
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
23 h 15 apart on the timetable, overnight
UA 785 leaves 23 h 15 after AI 173 arrives on the timetable: more than half a day, so not a connection we count.