How do you go from island to island on Poptropica?

Answer 1

On every island, there is a Main Street. On the main street is the blimp and when you climb up there it will show you the islands map. Then click where you want to go next.

Exceptions:

Astro Knights Island - you can only leave from Arturus. If you leave from space by closing your browser, your spaceship parks on top of the castle there.

Skullduggery island - you can only leave from Fort Ridley

Steamworks Island - To leave the storeroom, go up one level from the bottom. If you cannot leave by the normal method, see the Haunted House note below.

Shrink Ray Island - to leave when you are tiny, go to the small blimp at the left of CJ's room. To get across the bed, go to the thermostat above the desk and turn it to the red zone. Go back to the bed where the vent is blowing and dump over the wastebasket. You can climb up the floating papers.

Mystery Train Island - there is apparently no way to leave the island from the Chicago World's Fair unless you finish (!). To leave without finishing, you will need the Haunted House card from the Poptropica Store.

Haunted House - To leave an island anytime, buy and use the Haunted House card in the Store. You come and go through the hole at far right. When you enter and leave, you are thrown to the Island Map rather than where you left. This can help you escape sticky glitches.