Blizzard CM Kaivax posted today on the official WoW Classic forums that they are opening up free transfers for a limited time for the following realms:
They did not provide a time frame that these are allowed, only that they may be closed at any time as destination realms become full.
Later today, we’re enabling the Free Character Move service for three realms in this region that have recently been experiencing long queues: Incendius , Faerlina , and Whitemane.
We strongly encourage players who wish to use a Free Character Move to do so as soon as possible. Free Character Moves will be closed without warning for any destination realm that becomes full.
We’ll provide an update here when the Free Character Move service is enabled this afternoon.