The Best Time to Book Cheap Flights in 2025
Learn exactly when to search and book flights to get the lowest prices — backed by data from millions of searches.
Finding cheap flights isn't about luck — it's about timing. Based on fare data from millions of searches, here are the key rules for booking the cheapest flights possible.
Book 6–8 Weeks in Advance for Domestic Flights
For flights within the US and Europe, the sweet spot is 6–8 weeks before departure. Prices typically start rising steeply within 3 weeks of travel and become very expensive in the final week.
Book 3–5 Months Ahead for International Flights
Long-haul international flights — transatlantic, transpacific — are best booked 3–5 months in advance. Airlines release inventory at lower prices before filling seats as the date approaches.
Fly Midweek for the Best Prices
Tuesday and Wednesday flights are consistently cheaper than Friday and Sunday flights. The price difference can be 20–30% on popular routes.
Use a Pricing Calendar
Tools like Aviasales' pricing calendar show you the cheapest days to fly across an entire month. Shifting your dates by just 1–2 days can save hundreds of dollars.
Set Price Alerts
Don't check prices daily — set alerts and let the tools do the work. When a price drops to your target, book immediately.
Clear Your Browser Cache
Prices can appear higher on return visits due to cookies. Always search in incognito mode to see the true lowest prices.