10 things airlines won’t tell you - 10 things - MarketWatch

http://www.marketwatch.com/story/10-things-airlines-wont-tell-you-2013-12-13?link=sfmw

Many airlines charge $15 to $100 to check in luggage and those costs continue to rise each year. Between 2008 and 2012, the average cost to check in luggage per domestic roundtrip increased 212%, according to Airlines for America.