Just when you thought the end of summer meant the end of all things good and beautiful, here comes something to look forward to: Yet another airline has reduced its fares to insanely low prices—we’re talking $39 one way—and suddenly nobody’s complaining about cold temps or fading tans. JetBlue’s Fall Runway Preview Sale runs only today and tomorrow, so we can’t blame you if you skip the rest of this story for that link. A majority of the featured airfare costs less than your monthly Brazilian (not that you’ll need one come autumn), and the flash sale includes flights out of major cities like New York, Chicago and Boston between September 6 and November 8. You can even extend your summer with destinations like Barbados, Havana and San Juan. Regardless, you’ll want to book your tickets ASAP—and prepare to say goodbye to the dog days.