Airway transportation is the most affordable mode of transportation then any other transportation mode, it is less expensive to travel longer distances. For example, you can fly from New York to London for 2 to 3 times less than you would for in the sea transportation mode (Traveltips.usetodoay.com).
Time of travel in a plane would only last hours; not days like railroad, sea, or road travel. The longest the air travel might last is about a day long. Road travel has many accidents because there are many other people driving around as well and this makes so much traffic. About 1.3 million people die each year in road travel accidents.
On the other hand, airway travel is very safe way to travel. Airway has less accidents then any other transportation due to airplanes having different routes and less planes flying at once. Air travel has about 7 accidents or less a year with 19 or more passengers. The more advance the airplanes are, the less accidents there are. This is why there are less accidents in air travel than in any other transportation mode.
Information From: http://traveltips.usatoday.com/compare-plane-ship-travel-103896.html