Avengers: Infinity War will be available on digital, Movies Anywhere, and 4K UHD on July 31, with the Blu-ray release arriving two weeks later on August 14.
Marvel announced the release date along with the news that those who purchase Infinity War digitally will be able to view a “30-minute roundtable with Marvel Cinematic Universe (MCU) directors Anthony and Joe Russo, Jon Favreau, Joss Whedon, James Gunn, Ryan Coogler, Peyton Reed and Taika Waititi who reflect on how their movies contribute to the MCU’s larger storytelling adventure.”
Source: IGN.com Avengers: Infinity War Digital and Blu-Ray Release Dates Announced