After posting a surprisingly nice profit last quarter, JetBlue announced that it was dropping all flights to Columbus and Nashville. The airline said that its loads on the flights were OK (if slightly below average) but that the yields (average fares) weren’t acceptable. JetBlue has dropped cities before (Atlanta very early on, and Santo Domingo, Dominican Republic), but has recently been on an expansion streak (though one that has slowed in the past few months). It bodes will for the airline that they’re looking to maximize profits from each flight, rather than just sticking with what they’ve always done – that strategy, which was employed by virtually every airline in the 1990s and early 2000s, doesn’t work anymore. It’s a good sign that they’re thinking about optimizing their assets (or, in English, making themselves profitable).