Hawaii is quietest when the summer crowds clear out or before they arrive. Heading over between April and June, or from September to November, gets you warm water, empty beaches, and cheaper flights. It is the best time to see the islands without tripping over other tourists.
A typical flight from the US mainland runs about $560. Instead of dropping that cash all at once, we can break it down into smaller, monthly chunks to keep your budget intact.
Keep in mind that 0% interest is not a free pass. If you do not pay off the full balance within the 18-month window, the standard interest rate kicks in on whatever is left, which will quickly erase your savings.