DL 8840 then CI 5175 at San Francisco
Vancouver → San Francisco → Taipei
Timetable, San Francisco time
16:36DL 8840 from Vancouver at the gate
21:20CI 5175 to Taipei leaves the gate
4 h 44 apart on the timetable
The last days
DL 8840 and CI 5175 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.