Posted On: May 5, 2021

Starting May 1st 2021, all data transfer over a VPC Peering connection that stays within an Availability Zone (AZ) is now free. All data transfer over a VPC Peering connection that crosses Availability Zones will continue to be charged at the standard in-region data transfer rates. You can use the Availability Zone-ID to uniquely and consistently identify an Availability Zone across different AWS accounts.

Customers use VPC Peering to inter-connect VPCs within a region. VPC Peering is commonly used when interconnecting a small number of VPCs in a region to achieve full mesh connectivity. AWS Transit Gateway and AWS PrivateLink are the recommended mechanisms to inter-connect hundreds or thousands of VPCs at scale. 

This change is available in all AWS Regions including AWS Gov Cloud (US) Regions.