Very useful tips and tricks. I add on

Sometimes, airlines have chartered flight coming in/out in each particular country, usually 1 way of Full, however, the return will be empty, airline always (i mean literally always gives 30%-50% Discount from the original price). How to be updated on this is thru Travel Agent, some Travel Agent will update at their FB, Insta and Social Media to get the word out. You just need to be the first to know the info :)