Not more money if I opt for the 3:10 flight. I would assume, all flights that day would have the fee.
No.
If you dont go with partial days, today is 21 days from 8/17.
Since the fee kicks in only for flights made
less than 21 days, they are saying that if it is now noon, everything before noon is less than 21 days.
In a way, it is, cause its only 20.5 days away.