AS 2135 then AS 727 at Seattle
Billings → Seattle → Atlanta
Timetable, Seattle time
20:45AS 2135 from Billings at the gate
22:40AS 727 to Atlanta leaves the gate
1 h 55 apart on the timetable
Seattle’s board gives a departure time for only about 59% of its flights, so many days show no gate time.
The last days
AS 2135 and AS 727 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.