AS 537 then DL 2949 at Seattle
Burbank → Seattle → Las Vegas
Timetable, Seattle time
19:39AS 537 from Burbank at the gate
20:07DL 2949 to Las Vegas leaves the gate
28 min apart on the timetable
Seattle’s board gives a departure time for only about 56% of its flights, so many days show no gate time.
The last days
AS 537 and DL 2949 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.