BR 715 then BR 642 at Taipei
Beijing → Taipei → Anchorage
Timetable, Taipei time
23:55BR 715 from Beijing at the gate
07:15BR 642 to Anchorage leaves the gate
7 h 20 apart on the timetable, overnight
The last days
BR 715 and BR 642 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.