The new app provides real-time updates for customers about their BA flight throughout their journey, showing flight and departure information, live travel updates and gate alerts from Terminal 5.
The app introduces a new map feature, which downloads maps of airport terminals to guide customers through their journey. It is an update of BA's current Android and iPhone application.
As with the Android and iPhone BA app, users can check in through their mobile and download their boarding passes to their handsets.
BA customers are required to become a member of the airline’s executive club, which is free to join, in order to use the mobile boarding facility.
Richard Bowden, digital marketing innovation manager, British Airways, said: "This new app puts Window Phone 7 users in charge of their travel experience with British Airways like never before.
"The app has been built with the customer at heart, to give them more freedom and convenience.
"Our partnership with Microsoft ensures British Airways is the only UK airline to provide app access across a greater range of mobile platforms, and underscores our commitment to constant innovation and improvement."
The app will be available from the Windows Phone Marketplace from 1 June, across Orange, O2, Vodafone, Three and T-Mobile networks.