Flight Tips

The Best Time to Book Cheap Flights in 2026

✍ Alex Morgan·📅 March 15, 2026·⏳ 6 min read

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.

[**Search Flights with Flexible Dates on Aviasales →**](https://aviasales.tpm.li/UePBxUoM)

Frequently Asked Questions

How far in advance should I book cheap flights?

For domestic flights, book 6–8 weeks ahead. For international flights, 3–5 months in advance offers the best prices. Avoid booking within 3 weeks of departure when prices surge.

Is it cheaper to book flights on Tuesday?

Tuesday and Wednesday flights are consistently 10–30% cheaper than Friday or Sunday flights. Booking searches on Tuesday afternoon often shows lower fares as airlines adjust pricing after the weekend.

Should I clear cookies when searching for flights?

Yes — search in incognito/private mode to see true lowest prices. Airlines and booking sites sometimes raise prices on repeated searches from the same browser.

What is the best flight search engine for cheap flights?

Aviasales, Google Flights, and Skyscanner are the most comprehensive. Use Google Flights for its flexible date calendar, Aviasales for comparing budget airlines, and set price alerts on all three.

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