WN 544 then AC 4470 at San Francisco
Burbank → San Francisco → Ontario
Timetable, San Francisco time
10:30WN 544 from Burbank at the gate
14:00AC 4470 to Ontario leaves the gate
3 h 30 apart on the timetable
The last days
WN 544 and AC 4470 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.