AF 2661 then VA 8101 at San Francisco
Seattle → San Francisco → Chicago O'Hare
Timetable, San Francisco time
17:05AF 2661 from Seattle at the gatealso KL 5503
23:30VA 8101 to Chicago O'Hare leaves the gate
6 h 25 apart on the timetable
The last days
AF 2661 and VA 8101 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.