Travel costs fluctuate significantly based on seasonal demand: When Is the Best Time to Buy Plane Tickets? - CLEAR
Book 2 to 8 months ahead. For Europe, the sweet spot is often around 129 days (roughly 4 months) out. the cheapest time to buy plane tickets
Booking on Friday can save up to on domestic and 8% on international fares. Sunday also consistently shows lower average prices. Best Day to Fly Tuesday or Wednesday the cheapest time to buy plane tickets
Shifting a departure from the weekend to midweek can save an average of per ticket. Budget-Friendly Months the cheapest time to buy plane tickets
Book 1 to 3 months in advance. Data from Expedia suggests prices often bottom out around 44 days before departure.