WASHINGTON, DC (WUSA) -- Those Delta frequent flier miles will not add up unless you spend at least $2,500 a year on tickets.

The air carrier announced changes to every category of its SkyMiles Medallion program.

So, the higher the level, the more you will have to spend to earn the reward.

Delta says the new rules could bump some fliers down to a lower level or even out of the program.'

The changes start January 1, 2014.