Discover Combat Pilot FTO (Flight Training Operations) for FSX advertised as an online multiplayer environment. Progress in one of the 25 nation career you can select from, train and graduate.
It will be a monthly subscription access. In the first 49,99 US$ are included 3 aircraft developed by A2A, 7 new military bases, and of course the first month fee. If you cancel your membership, the new addons you got with Combat Pilot FTO will remain functional.