We all know the magic time to buy a plane ticket is precisely 54 days in advance, for domestic travel.
But what if you're flying beyond the U.S.?
The experts at CheapAir recently researched the cheapest day to buy plane tickets for a whole host of international destinations. And as it turns out, you'll need to plan much more than 54 days ahead of time if you're heading to the waterfalls of Iceland of beaches of Brazil. Take note of Business Insider's handy map of the info, and prepare to score a sweet deal.