You Do Need power plug adapter while traveling from Åland Islands to United States Virgin Islands.

Here is Why You Need An Adapter

The outlet and plug type used in United States Virgin Islands are A and B and in Åland Islands are C and F. This is how they look like.

Åland Islands

In Åland Islands, outlets of type C and F are in use.

Type C

Type F

United States Virgin Islands

In United States Virgin Islands, outlets of type A and B are in use.

Type A

Type B