what is Virtual airlines?

          A virtual airline (VA) is a dedicated hobby organization that uses flight simulation to model the operations of an airline. Virtual airlines generally have a presence on the Internet, similar to a real airline.Many hundreds of virtual airlines of significance currently active, with tens of thousands of participants involved at any one time.

       
               Virtual airlines were started to give a sense of purpose to activities conducted within a flight simulator. This basic premise has evolved over time, along with available technology, to provide increasing levels of immersion but always with the same core purpose. When combined with increasingly powerful personal computers, advancing flight simulation software, and communications networks, virtual airlines are often able to provide compelling, realistic, experiences similar to operations inside a real airline. Virtual airlines also provide an avenue for members to gain access to additional content, such as aircraft and scenery, for use with their simulator. The appeal varies; for younger members, virtual airlines provide a sandbox environment where they can experience the corporate environment of commercial business in the airline industry, without the risk of financial loss. These organizations also provide an outlet for those who are interested in aviation but unable to fly themselves in real life due to financial, health, or other reasons.

            Academics have stated that members of these groups can often show significant attachment and immersion in their activity, building strong relationships with those who they share their created "space" with. Participants can become unusually dedicated and committed to their group through the forging of their strong bonds and sense of identity, despite the construct being entirely (or nearly entirely) fictional. Some of the groups are run similar to real-world airlines, and members can get a taste for being a professional pilot by joining one of the organizations. Commentators have described virtual aviation as giving Flight Simulators an interest and depth that they would otherwise not have

Platforms

A video game is required for the actual conduct of operations by organization members. There are several platforms that are typically used to conduct simulated operations, although by definition almost any flight simulation video game can be utilized by such an organization. Common games include:
FlightGear
Fly!
Microsoft Flight Simulator
X-Plane