Mexico/Caribbean: A shorter window of is often sufficient. When to Book Even Earlier
For the best balance of price and availability, aim for these general timeframes based on your destination: Book 1 to 3 months in advance.
If your plans aren't flexible, the "Goldilocks Window" might be too risky. You should book as soon as schedules open (typically ) for: How Far in Advance Should You Really Book a Flight? - Going
The Sweet Spot: Many fares hit their lowest point around before departure. International: Book 2 to 8 months in advance.