Comcast Corp. said Wednesday it would acquire online movie vendor Fandango Inc. for an undisclosed sum.

The Los Angeles-based Web site, which provides moviegoers with show times and allows them to buy tickets before going to the box office, will become a part of Comcast Interactive Media. Chuck Davis, founder of the site, will continue to run the company and will remain its chief executive.

Comcast, the world’s biggest cable-television provider, also said Fandango will play a key roll in its newest Web venture, a site that will enable users to view shows on demand via television, the Internet or mobile devices. The site is set to launch this summer, the Philadelphia-based cable company said.

The acquisition is part of an ongoing strategy shift by Comcast to offer more programming via broadband, wireless or mobile phone. Comcast said it expects the deal to close in the second quarter.