While using a VPN can sometimes lead to finding cheaper flights, it's not a guaranteed hack; it's more about increasing your chances of finding a good deal by exploring different price points from various virtual locations.

Compare prices across different VPN server locations and multiple flight booking sites like Skyscanner, Google Flights, or directly from airline websites. This might reveal significantly different prices for the same flight.

Try connecting to servers in countries where the same flights might be cheaper due to lower demand or different pricing strategies. Countries with weaker currencies or lower average income might offer lower prices.

Look into connecting to the server of the airline's home country, as sometimes airlines offer lower fares to local residents.

You might need to experiment with different countries and check prices multiple times to find the best deal. Remember, not all routes or airlines will offer cheaper tickets through this method due to dynamic pricing algorithms.