How can a loyalty program make passengers feel unappreciated? Delta is the first legacy airline to tie the value of its frequent-flier program to the amount of money you spend, as opposed to the number of miles you fly. Beginning Jan. 1, 2014, the airline’s frequent fliers will earn “elite” status, which gives them access to upgrades and other perks, through a combination of miles or segments flown and annual spending on Delta flights.

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