Southwest Rapid Rewards points used to be worth 1.69 cents each. Starting March 31, 2014, they will be worth about 1.44 cents each.

What is the exact devaluation?

Among the Six Types of Frequent Flyer Miles, Southwest has a fixed-value program. For every dollar of the "Wanna Get Away?" base fare, you have to spend 60 Rapid Rewards for an award ticket.

So a $220 Southwest ticket with a $200 base fare would be 12,000 Rapid Rewards + $5 in taxes as an award.