FrugalDad.com's Why the Airlines are Bankrupt infographic is a review of the business of flying that aims to explore how such a large and necessary industry could be losing money. This graph tries to make sense of the 20 airlines that filed for Chapter 11 protection in the last decade.

In total, the airline business has lost $60 billion since its deregulation in 1978, and Pan-Am, an iconic airline that was the world's largest for 64 years, no longer exists. The railroad industry has a profit margin of 15.7%, 12 times more than the airline industry, which sits at 1.3%.

The Why the Airlines are Bankrupt infographic tries to explain the circumstances that lead to an essential industry flying so low to the ground.