You Do Need power plug adapter while traveling from Antigua and Barbuda to Saudi Arabia.

Here is Why You Need An Adapter

The outlet and plug type used in Saudi Arabia is G and in Antigua and Barbuda are A and B. This is how they look like.

Antigua and Barbuda

In Antigua and Barbuda, outlets of type A and B are in use.

Type A

Type B

Saudi Arabia

In Saudi Arabia, outlets of type G are in use.

Type G