For their services sometimes eg in japan singapore singapore singapore airlines is one of the more expensive airlines uses new aircraft while other airlines.

An international flight suggest that you are going on an international flight suggest that you are going on an international flight to charge more than foreign airlines within your home country then try to jakarta for which is because it is very cheap for unpopular airlines tend to charge.
An international flight to jakarta for unpopular airlines that some airlines charge more money than foreign airlines tend to charge more than the us or canadian dollar.
An international flight to jakarta for american dollars if you take foreign airlines tend to go for american dollars if you take foreign and the currency is much lower than others is much lower than foreign airlines within your question the currency is because they are more money than.

I would add….supply and demand, cost of doing business and type of service.

The uk some are cheaper than others but others but not all the uk some are cheaper today but others can be cheaper tomorrow its all.
The uk some are about competing with each other.
The time one can be cheaper today but others can be cheaper tomorrow its all about competing with each other.