You Do Need power plug adapter while traveling from Spain to United Arab Emirates (UAE).

Here is Why You Need An Adapter

The outlet and plug type used in United Arab Emirates (UAE) is G and in Spain are C and F. This is how they look like.

Spain

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

Type C

Type F

United Arab Emirates (UAE)

In United Arab Emirates (UAE), outlets of type G are in use.

Type G