Bareboat Trip Planning - Ionian and Getting There

My family is starting to plan a trip to Greece in Sept 2027, and we are planning a charter for a week out of Lefkados. I’m starting to try to figure out some of the details (knowing flights change and all that), but I am hitting a wall with flights to/from Preveza Airport.

There don’t seem to be any flights to/from Athens out of here in mid-September. Is this typical?

The airport website is showing arrivals from a bunch of other European cities…do we need to fly Toronto-(London//Frankfurt/Vienna/etc)-Preveza instead?