BR 18 then BA 1650 at San Francisco
Taipei → San Francisco → New York JFK
Timetable, San Francisco time
15:00BR 18 from Taipei at the gatealso TG 6252, CM 8011
15:53BA 1650 to New York JFK leaves the gate
53 min apart on the timetable
The last days
BR 18 and BA 1650 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.