Book 2 to 8 months ahead. For Europe, the sweet spot is often around 129 days (roughly 4 months) out.
Book 1 to 3 months in advance. Data from Expedia suggests prices often bottom out around 44 days before departure. the cheapest time to buy plane tickets
For 2026 travel, the cheapest time to buy plane tickets depends more on you book than the specific day of the week you purchase them. While "Travel Tuesday" was once a gold standard, dynamic pricing now makes great deals pop up any day. Optimal Booking Windows Book 2 to 8 months ahead
