BA 197 then CX 3171 at Houston
London → Houston → Anchorage
Timetable, Houston time
19:55BA 197 from London at the gate
17:00CX 3171 to Anchorage leaves the gate
21 h 05 apart on the timetable, overnight
CX 3171 leaves 21 h 05 after BA 197 arrives on the timetable: more than half a day, so not a connection we count.