Follow the below steps to transfer AWS EC2 instance one region to another region:

• Log into your AWS management console and navigate to EC2 service in the source region.
• Select the instance and click on Actions drop-down menu, hover on the image, and click Create Image.
  
  

• A Create Image window appears. Fill the details Image name, Image description, and click on Create Image.
  Note: There is a checkbox No reboot; by default, the checkbox is not selected, which means when the image is taken, the Instance will not be restarted. And if this checkbox is selected, the Instance will be restarted.
  
  

• The time taken to create an image depends on the instance type and the size of the EBS volume of the instance. 
• Click on Images drop-down and select AMIs to view the status of your image.

• Once the AMI status is updated to Available status, you can copy the AMI to the target region.
  
  

• A Copy AMI window appears. Add the details like Destination Region, Name, Description.
  

• Let’s select the destination region as US East (Ohio) and click Submit.
  
  

• Switch to the US East (Ohio) region and select AMI. You will find the copied AMI.
  
  

• As the AMI is available in the target region, now you can launch an EC2 instance using this AMI.
  
  

• The launch wizard appears. The same steps are to be followed as we do while launching an EC2 instance.