Blizzard has opened up several new realm-to-realm transfer options. If you are on one of the overloaded realms listed, you may want to consider a change.

We will be opening realm-to-realm character transfers from select PvP realms to Cho'gall and Korgath on Monday, June 12 at 3:00 AM PDT. The destination realms currently have lower population than the chosen transfer realms, and should make a good home for those seeking to build a name for themselves on Azeroth.

PvP realm Cho'gall - Deadline: Thursday, June 15 at 3:00 PM PDT
Players on these 3 realms will have the opportunity to transfer to the PvP realm Cho'gall:

Bleeding Hollow –> Cho'gall
Mannoroth –> Cho'gall
Skullcrusher –> Cho'gall

PvP realm Korgath - Deadline: Thursday, June 15 at 3:00 PM PDT
Players on these 3 realms will have the opportunity to transfer to the PvP realm Korgath:

Shattered Hand –> Korgath
Stormreaver –> Korgath
Warsong –> Korgath

For complete details visit Blizzard's site here.