True, there is no requirement. But if you DO check in 24 hours prior, get your boarding pass digitally, you will avoid the problems that the OP had. This is still a very "strange" time. Regent Air is slammed with all the airline schedules, people booking cruises and wanting air deviation, and people with problems. The airlines are cancelling flights daily. Sure, Regent should notify you IF they were notified. But I, for one, will not leave it up to them. I check my flights frequently simply to avoid any surprises. I won't be caught going to the airport for a flight that was cancelled a week earlier.