AS 2135 then AS 2178 at Seattle
Billings → Seattle → Spokane
Timetable, Seattle time
20:45AS 2135 from Billings at the gate
07:16AS 2178 to Spokane leaves the gate
10 h 31 apart on the timetable, overnight
Seattle’s board gives a departure time for only about 57% of its flights, so many days show no gate time.
The last days
AS 2135 and AS 2178 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.