There are tons of factors that influence the price of flights, such as:
How wealthy the country is.
How expensive it is for the airline to operate flights to or from a country.
How popular the flights are in your country.
How popular the destination is.
If you’re traveling during high or low seasons.
Political events or changes that take place in a country.
If you’re located in the same country as the airline you want to fly with.
I recommend using these metrics, as well as a VPN (like ExpressVPN) and the other tips mentioned in this article, when booking flights, as they might help you save money.