129 days (roughly 4 months) before departure is ideal.
Recent reports show a shift in traveler behavior that has changed traditional "best day" advice. The best time to book flights for cheap airfare in 2026 best time to buy airline tickets online
Aim for 28 to 86 days before your trip. The "sweet spot" is often around 44 days out . International Flights: Plan to book 3 to 6 months ahead. 129 days (roughly 4 months) before departure is ideal
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