Levelling up to another airport

I just updated the game to 2.0, but im so confused, how do i switch to the other airports? Do i need to still reach a certain amount of handled passengers? And i can see you can use golden planes or smthn, how do i obtain that?

No to unlock new airports you need to level up the XP…go to the XP in an airport…scroll right to the last…there somewhere you will see the new airport tag…that is where its unlocked from