Yes, you can get a refund up to 30 days out, I think.
Just remember that you can try to rent
DVC points at the 11-month mark. I don't know if that extra month will make a difference in your airfare prices, but if you can hold on until 11 months out, you could get the room squared away and book the flights right after.
But yeah, if you want to book another room a year ahead, then discover something opens up in DVC, you can cancel your original reservation and get a full refund as long as it's 30 days prior to check-in, which, of course, it would be.