Are the flying in December

Pretty sure they're open year round other than bad weather.

Probably depending upon weather conditions. I'd call to confirm their schedule

Sign says they fly 365 days a year

It was pretty fun, I don't know about December tho

I would call and ask. I honestly don't know.

I have not seen if they do. I would assume so. But if I were you I would call and ask. It is a really fun activity to do