If you want to show artboards in order you can achieve a slideshow like effect using the Single Page Application option.
In the Export Artboard dialog switch to the advanced screen and select Selected Artboards or All Artboards option:
In the export type select Single page (Slideshow with navigation buttons).
The exported page should have a navigation area in the bottom of the screen. Use these buttons to move forward and back through all the exported artboards:
You may also want to add keyboard navigation to the slideshow. Select the Keyboard Navigation option: