When is the best time to book long-haul flights? According to Ski Vertigo, you should book long-haul flights approximately ...

But if you haven't done so yet or you habitually wait until the last minute to do so, you can use a series of tools you already have to snag some of the cheapest plane tickets possible.

If you do, read on to learn why flight prices fluctuate and get four insider secrets that can help you book cheap airfare. Flight prices are determined by a complex algorithm that includes factors ...