Does clearing my browser cookies actually lower prices?

Not directly. However, airline websites use dynamic pricing that increases based on search frequency. Using incognito mode prevents them from seeing your specific search history for that route.

Is it cheaper to wait until the very last hour to book?

No. Airlines generally stop selling tickets 2–4 hours before departure. Booking 24 hours out is usually the 'sweet spot' for finding remaining inventory.

Booking Last-Minute International Flights Without Overpaying

Use incognito mode to track prices, prioritize hub airports, and be ready to book exactly 24–48 hours before departure when airlines dump unsold seats. If you are desperate, check aggregator sites for 'hidden city' ticketing options, but be prepared for limited luggage and no flexibility.

Use aggregate search engines first. Start with Google Flights or Skyscanner to view a calendar of price trends. Do not book yet; just identify which days are cheapest to fly.
Check regional or budget carriers. Major legacy carriers rarely lower prices at the last minute. Look for local budget airlines (like Wizz Air, AirAsia, or JetBlue) that operate point-to-point flights; they often sell remaining capacity at a discount to fill the plane.
Search for one-way tickets. Last-minute round-trip deals are non-existent. Search for two separate one-way tickets on different airlines; you will often find better inventory and price combinations this way.
Use 'Hidden City' ticketing. Check sites like Skiplagged to see if flying to a further destination with a layover in your desired city is cheaper. Only do this if you are traveling with carry-on bags only, as you cannot check luggage.
Book via the airline directly. Once you find a deal on an aggregator, go to the airline's own website to finalize the booking. This makes it significantly easier to manage changes or get support if your flight is delayed.

Does clearing my browser cookies actually lower prices?: Not directly. However, airline websites use dynamic pricing that increases based on search frequency. Using incognito mode prevents them from seeing your specific search history for that route.
Is it cheaper to wait until the very last hour to book?: No. Airlines generally stop selling tickets 2–4 hours before departure. Booking 24 hours out is usually the 'sweet spot' for finding remaining inventory.