For international flights, the best time to buy is typically before your departure . This timeframe, often called the "Goldilocks Window," offers the best balance between price stability and seat availability. While domestic prices drop closer to the date, international airfare usually starts a steady climb once you are less than two months out, with prices skyrocketing in the final 21 days. The Prime Booking Windows
Depending on your destination from the U.S., the ideal window shifts: best time to buy an international flight
Friday and Sunday typically command the highest fares due to weekend traveler demand. For international flights, the best time to buy