JetBlue Airways is tacking on an extra fee for checked bags on peak travel days in an effort to improve profitability. The New York-based carrier told FOX Business that it will charge an extra $5 for the first bag checked, followed by an additional$10 for the second bag during high-traffic periods. For JetBlue, the cost for Blue Basic, Blue and Blue Extra travelers to check their first bag within 24 hours of departure rose to $45. The cost for a second checked bag within 24 hours of departure also increase ...