For most international leisure routes, start tracking 4–6 months out and book in a window roughly 2–5 months before departure. Book peak dates (summer, holidays, festivals) as early as fares open. It's a tendency by route, not a guarantee — set alerts and buy at your target.
International fares open around 11–12 months ahead but are usually highest right at release and again in the final weeks. The reasonable middle is where deals appear.
Rough windows:
- Transatlantic (US–Europe): 6–12 weeks, earlier for summer.
- US/Europe–Asia: 8–16 weeks; as early as possible for cherry-blossom or Golden Week.
- To the southern hemisphere in their summer (Dec–Feb): 4–6 months.
Always book early for: holidays, school breaks, major events, and any date where flights are limited.
The method beats the calendar: check the route’s typical window, set two or three price alerts, decide a target price, and buy when it’s hit. Our route guides give specific windows for popular city pairs.
Related questions
When is the best time to book a flight?
There is no magic day. For most routes, book 1–3 months ahead for domestic and 2–6 months for international, earlier for peak dates. Track prices with alerts and buy when the fare hits a target you set in advance. Full answer →
How do I find cheap flights?
Search flexible dates on Google Flights and Skyscanner, check nearby airports, set price alerts, consider one-stop routings and stopover programs, and compare the total cost with bags and seats — not the headline fare. Full answer →
What day of the week is cheapest to fly?
Tuesday, Wednesday and Saturday departures tend to price lower on many leisure routes; Friday and Sunday are usually the most expensive. It's a tendency by route, not a rule — always check the date grid. Full answer →
Airline, airport and government rules change without notice. Treat this as a starting point and confirm with the airline or authority for your specific trip. Request a correction if something is out of date.