aws route 53 creating alias to a s3 bucket static website

 

Go to Route 53.

Go to hosted zone and create one if you don't have one. 

Then click on create record, provide a name. For the record type choose "A". Then ensure you click on Alias. The list of traffic endpoint will appear as shown below:-

Select your s3 webstatic and click on "Create record".

Reference 

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/RoutingToS3Bucket.html