Currently you can stream Justice League with a subscription to HBO Max. You can also stream the movie with SlingTV. You could previously stream the movie with DIRECTV but it has now been removed from the platform, we'll update this page if we find more streaming options for Justice League.
If you don't have access to HBO Max or SlingTV then you can buy or rent Justice League to watch online from digital platforms such as VUDU, Microsoft Store, FandangoNOW, Apple iTunes, Google Play Movies and YouTube. You can rent the movie for as little as $3.99 and you can buy the movie for as little as $14.99.