You're never going to get a true steal on holiday plane tickets, but if you want to avoid spending your whole salary flying to visit your relatives over Thanksgiving, the time is nigh to start picking seats. That's according to the experts at Condé Nast Traveler, who cite data from Expedia and Skyscanner.

The latter found that it was cheapest to secure Thanksgiving tickets 11 weeks before the holiday. That means that you should have bought your ticket around September 4, but it's not too late; you can still save if you book now. Expedia's data shows that the cheapest time to buy is 61 to 90 days before you leave, so you still have until September 23 to snag a seat on a major airline without paying an obscene premium. (Relatively speaking, of course.)

When major travel holidays aren't involved, data shows that the best time to book a plane ticket is on a Sunday, at least 21 days ahead of your travel. But given that millions of other Americans also want to fly on the exact same days during Thanksgiving and Christmas, the calculus of booking is a bit more high stakes. If you sleep on tickets this month, you could be missing out on hundreds of dollars in savings. In the recent study cited by Condé Nast Traveler, Expedia found that people booking during the 61- to 90-day window saved up to 10 percent off the average ticket price, while last-minute bookers who bought tickets six days or less from their travel day paid up to 20 percent more.

Once you secure those Turkey Day tickets, you've got a new project: Your Christmas flights. By Hopper's estimates, those flights rise in price by $1.50 every day between the end of October and December 15 (after which they get even more expensive). However, playing the waiting game can be beneficial, too. Expedia found that the cheapest time to book Christmas flights was just 14 to 20 days out.

Before you buy, we also recommend checking CheapAir.com, which tracks 11,000 different airfares for flights around the holidays to analyze price trends. Because as miserable as holiday travel can be, you don't want to pay any more than you have to.

[h/t Condé Nast Traveler]