It’s Tuesday, so this must be airfare sale day. JetBlue is having a one-day sale on flights starting at $55 one way. Book today only for flights between July 31st and October 31st. Sample fares are $55 between New York and Washington,DC, $100 between New York and Palm Beach, $159 between New York and San Juan, Puerto Rico. And remember — your first bag flies FREE on JetBlue, which is another $25 saving. For another Travel Tuesday airfare deal, scroll down a couple of postings for the Southwest Airlines sale fare.