Ekaton

I’ve just discovered this game today, and it looks extremely promising! It lets you manage an airline (real or custom) from as early as 1930 to present day, and the game does a rather good job adjusting everything to reflect how the world changed over time. It’s still very early in its development and in need of people to support its development, but it’s free and overall it’s more than worth a shot. http://theairlineproject.net/