Plane tickets are cheaper now than they were in the past when you had to pay one time and everything was all-inclusive. The emergence of discount airlines has changed the industry. You can fly for a very low price if you don’t need anything but a seat and have no luggage. Nowadays, it’s not uncommon for airlines to tack on a few hundred extra dollars for luggage, carry-ons and more. Then there are the hidden fees. Companies made more than $6 billion in profits from baggage, cancellation and change fees in 2014 alone, according to a Department of Transportation report.