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

Here is Why You Need An Adapter

The outlet and plug type used in Azores are B, C and F 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

Azores

In Azores, outlets of type B, C and F are in use.

Type B

Type C

Type F