UA 216 then B6 1034 at San Francisco
Dallas-Fort Worth → San Francisco → Boston
Timetable, San Francisco time
12:42UA 216 from Dallas-Fort Worth at the gatealso AC 3154, VA 8519, NZ 9091
12:14B6 1034 to Boston leaves the gate
23 h 32 apart on the timetable, overnight
B6 1034 leaves 23 h 32 after UA 216 arrives on the timetable: more than half a day, so not a connection we count.