DL 669 then AV 2354 at San Francisco
New York JFK → San Francisco → Denver
Timetable, San Francisco time
12:39DL 669 from New York JFK at the gatealso LY 4133, VS 4753, KQ 7049, LA 7126
05:00AV 2354 to Denver leaves the gate
16 h 21 apart on the timetable, overnight
AV 2354 leaves 16 h 21 after DL 669 arrives on the timetable: more than half a day, so not a connection we count.