B6 215 then UA 8135 at San Francisco
New York JFK → San Francisco → Denver
Timetable, San Francisco time
13:40B6 215 from New York JFK at the gatealso KQ 7282
18:00UA 8135 to Denver leaves the gate
4 h 20 apart on the timetable
The last days
B6 215 and UA 8135 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.