January 25, 2012
A Delta Airlines plane taxis past a gate at Logan Airport in Boston. (File)
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Delta Air Lines Inc said on Wednesday it would make a major change to its frequent-flier program, basing the number of miles earned toward free flights on how much customers spend rather than the distance traveled.
Delta Air Lines' fourth-quarter net income rose sharply, as higher fares offset a bigger fuel bill.Like other carriers, Delta was able to raises fares by cutting the amount of flying it did at the end of last year. The money it made flying a passenger a single mile rose 12 percent.