Most airlines operate on a rolling schedule where new dates are added daily.
Booking as early as possible rarely yields the lowest price. Experts often refer to a "Goldilocks Window"—not too early and not too late—to find the best deals. Destination Recommended Booking Window Sweet Spot 1–3 months in advance ~44 days out International 2–8 months in advance ~129 days out (for Europe) Peak Holidays 3–10 months in advance As early as possible Best Day And Time To Buy Plane Tickets - Forbes how far in advance can you buy airline tickets
Many major international airlines, including British Airways and Lufthansa, release flights up to 355–362 days out. Most airlines operate on a rolling schedule where