Currently you can stream Thor: The Dark World with a Disney+ subscription if you're based in the US. Unlike many other Marvel movies, you can also stream Thor: The Dark World with other streaming platforms such as SlingTV and FXNow. If we find more streaming options for this movie then we'll update our page.
If you don't have access to Disney+, SlingTV or FXNow then you can buy or rent Thor: The Dark World to watch online from a few different digital platforms including FandangoNOW, VUDU, Google Play Movies, YouTube, iTunes, Microsoft Store and Prime Video. It'll cost you as little as $2.99 to rent the movie and $19.99 to buy the movie.