Download of Airlines 2.51 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the free program is Selectsoft Publishing.
This free PC program is developed for Windows XP/7/11 environment, 32-bit version. Airlines is included in Games. The most popular version among the software users is 2.0. We recommend checking the downloaded files with any free antivirus. The default filenames for the program's installer are Airlines.exe, Airlines2.exe or IDriver.exe etc.
From the developer:
As the owner of a new airline, and it's up to you to pilot your company to financial success. You control of every aspect of your business, from the types of planes you fly and their routes, to your corporate investments and acquisitions. But in a world of sudden tropical storms, oil crises, ill-tempered passengers and stressed-out flight personnel, it looks like cloudy skies might be coming!
You may want to check out more software, such as Airline Tycoon, Delta Virtual Airlines A320 FS2004 or Posky Boeing 777-300ER Philippine Airlines, which might be similar to Airlines.