The Big Sick - watch online: streaming, buy or rent
Currently you are able to watch "The Big Sick" streaming on Crave, Crave Starz, Starz Amazon Channel. It is also possible to buy "The Big Sick" on Apple TV, Amazon Video, Microsoft Store, Cineplex as download or rent it on Microsoft Store, Apple TV, Cineplex, Amazon Video online.
You can also stream the title for free on Plex.