Airlines earn $22.6 billion in fees in 2011

Airlines are making billions of dollars off of the extra fees they charge flyers.

It claims at least 50 airlines around the world made billions of dollars in revenue from baggage fees and extra charges last year.

The report finds the airlines' extra costs took in more than $22 billion in 2011. That's nearly 70 percent more than in 2009.

United-Continental, Delta, American and Qantas made the most money of the major airlines in fees.

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