Dynamic Cabin Classes
Unlike most Airline Tycoon style games, ASW doesn't limit you to having only certain classes, there is no such thing as 'business class' passenger, instead every passenger has a price they're willing to pay and certain perks they expect for that price. This gives you freedom to classify your airline however you wish, but be careful, offer too many perks to the premium economy passengers, and you might just see that they won't buy that business class ticket after all.
Real Passengers, Real Itineraries
The passengers flying your airline are real passengers with real itineraries and real connections. Cancelling one flight will have an impact across your network of routes, so plan carefully!
In ASW, maintenance is not an ongoing cost, each plane has its own maintenance record, with its own maintenance needs. Different checks will require a different amount of money. You might want to sell off your planes before they require a D check!
And the best part? Its all Completely free! So start building your airline today!