We had lots of questions, when the world-transfers will be enabled. 
We have been waiting untill both of worlds will be equal - and that already happend !

Transfer cost ? Untill friday 18.01.2018 its free

How to transfer? Simply login on your account at usa2.wearetibia.com then click World- Transfer

However, USA2 world had different upgrade system, and players was able to upgrade the weapons way higher than +9, due to that reason during character world transfer all upgrades from items will be removed.