Did you get some money for Christmas this year? If you did, and you are thinking about a vacation in 2018, you need to book it soon if you want to save the most money.
January is far and away the cheapest month of the year to book air travel, according to Skyscanner.
Domestic flights are, on average, 16% cheaper the first two weeks of January than they are the rest of the year. International travel is an even better deal, as flight historically drop 36%.
March is the worst time of the year, by the way.