Getting a sprite to prioritize it's destination

I'm been stroking my chin for a couple of hours now trying to figure out how to achieve this:

I have a sprite that I want to identify the closest object to itself with the private variable 'Flagged' showing a value of 0, walk over to (the sprite is using the RTS movement behavior) that object and set the Flagged variable to 1, and then find the next closet object with 'Flagged' set to 0, and so on.

...Any ideas of how to accomplish this?

Does this work?

If sprite is not moving

if object value "flagged" = 0

pick closest object to sprite.x, sprite.y

• sprite: move to object

sprite arrives at target

sprite is overlapping object

• set value 'flagged' to 1