ars is that you are able to begin your trip whenever you want, stop wherever you want, there's more freedom.
             If we were talking about the worldwide airline industry another major threat would have been trains but here in the US they're not very fast and also their prices aren't competitive ( compared to flight tickets) and finally it's not in people's culture here in America to use railroads for their trips. In Europe or Japan trains are a serious menace to airlines' profits.
             In addition to that, the rise of new technologies such as the Internet, videoconferencing and webconferencing have made communications much easier. There's no need to physically meet anymore. These alternatives are faster ( just a couple of mouse clicks and you can see each others, no need to plan trips anymore ) and cheaper ( no ticket to pay).
             Finally, last but not least, some companies now use "corporate jets" ( sometimes shared between more than one company), instead of " first class" tickets for their top executives.
             In a nutshell, all these substitutes are eating profits that airline companies could make, since some of these alternatives are more appealing to customer for various reasons.
             Furthermore, potential entrants also could be a serious threat in this industry. The general trend is entering the industry by acquiring gates in small and not very famous airports, since gates in the hubs are a
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