More than 85% of holiday travelers missed out on locking in the lowest fares for the 2016 holiday travel season, Expedia said, because they booked too late.
According to 2016 Expedia flight data, "the sweet spot" for booking Thanksgiving travel is 61-90 days out. Travelers who booked during that timeframe saw savings of up to 10%, while those that waited until the last minute, zero to six days out, paid more than 20% above the average ticket price.
For 2017, the optimal window to book and save begins in late August and runs through September 23.
For Christmas, the cheapest time to book travel is 14-20 days out, where travelers saw savings of around 5% in 2016. Last minute bookers paid more than 15% above average ticket prices.