Wondering what is the best time to book flights for Christmas? To get the best deals, it's ideal to book your Christmas flights between late September and mid-October. Booking too early or too late can result in higher prices due to fluctuating demand and limited availability. For the best time to book Christmas flights, aim for around 70 to 100 days before departure. Travelers searching for the best time to book flights for Christmas should also consider flying on less popular travel days like Christmas Eve or Christmas Day to save even more. Planning ahead and staying flexible with dates can help you secure lower fares and avoid holiday stress. Start watching prices early to snag the best deal.