Is the data traffic between EC2 and Lightsail free (in EC2 billing)?

Question

I looked at the pricing pages for both EC2 and Lightsail but could not find anything.

I am more concerned about data bills on EC2 side as EC2 data is much more expensive.

I can relocate servers to be in the same region if that helps reduce cost.

Answer 1

Data between Regions is definitely charged at full Data Transfer prices.

Data within the same Region but in different AZs would be charged at 1c/GB (possibly 2c/GB since it might be charged from both ends).

The lowest-cost option would be to establish VPC Peering between Lightsail and your VPC, and having the resources in the same AZ. This should (?) eliminate any Data Transfer charge.

This might be helpful: Understanding Data Transfer in AWS - The Duckbill Group