Well, you can't transfer a LIGHTSAIL instance from one account to another. It would be nice, but it's just not possible currently.
As far as I can tell, the only thing you could do is export your LS instance to EC2 and transfer that instance using the instructions here: https://aws.amazon.com/premiumsupport/knowledge-center/account-transfer-ec2-instance. Unfortunately, this means your instance is now in EC2 and you don't have the ease of use benefits of Lightsail.
Thanks for using Lightsail. Unfortunately Lightsail currently does not support transferring a instance to another account in Lightsail. Only option you have is to export Lightsail instance to EC2 following https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-exporting-snapshots-to-amazon-ec2 which EC2 support such operations.
Please feel free to let us know if any further help needed.
Please make sure the product managers are aware that this capability would be very nice to have, especially for those of us who are helping people deploy applications on Lightsail.
It would be very helpful to be able to transfer a lightsail instance from one AWS account to another... please?
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