JetBlue is bringing back its popular All-You-Can-Jet pass, which allows anyone to travel to an unlimited number of cities over a one-month period. It's a chance for the airline to fill empty seats during what is traditionally the slowest time of the year and hopefully, for JetBlue, to create the same wide-ranging social buzz it generated last year when it launched the promotion for the first time. And for consumers with wanderlust, stamina, $700, or better yet, a combination of all three, it's a continual ticket to any destination in the U.S. and Caribbean for 30 days. The pass is valid for flights between Sept. 7 and Oct. 6, the company announced Tuesday. There are two price tiers: an unlimited pass for $699 or a $499 pass that excludes travel on Fridays and Sundays. Last year, the unlimited tickets cost $599 and they sold out fast. The pass gave the 10-year-old airline a wave of publicity, with travelers documenting their journeys on Facebook and Twitter. Those could get tickets began setting up happy hours in far-flung cities just because they could, and other companies took advantage of the growing hubbub. Hotels like the Hyatt and Ritz Carlton, which had struggled through the recession as business travel faded, offered discounts to draw the group in. People used the pass for tours of the nation's sports stadiums, music meccas, and even 30-day job-search blitzes.

Road warriors and vacationers are keeping Southwest Airlines flights full, but the company's chief executive remains cautious about the future. "It's a heck of a lot better than it was a year ago," said Gary Kelly, chairman, president and CEO of the Dallas-based carrier. "There's just a great deal of uncertainty on a variety of fronts that would argue for caution." Energy prices are volatile and the economy is still sluggish, he told about 6,000 people attending the National Business Travel Association's annual convention. The event, which was held at the George R. Brown Convention Center, will bring about $5.8 million to the Houston economy, according to the Greater Houston Convention & Visitors Bureau.