BR 751 then BR 24 at Taipei
Shanghai → Taipei → Seattle
Timetable, Taipei time
18:00BR 751 from Shanghai at the gate
23:00BR 24 to Seattle leaves the gate
5 h apart on the timetable
The last days
BR 751 and BR 24 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.