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Delta and United Will Raise Frequent-Flyer Requirements for Premium Seats - Businessweek - http://www.businessweek.com/articles/2013-12-19/value-of-freq...!
"The number of award miles needed to snag a seat in the premium cabin will rise dramatically next year at Delta (DAL) and United (UAL)—and airline mile collectors are fuming." ‎- silpol