When Skybus Airlines started flying out of the Portsmouth International Airport in May, it was hard to get excited about its only destination: Columbus, Ohio. Even if the first 10 seats on each flight were sold for a mere 10 bucks each. But now that the micro-airline has added two Florida destinations to its routes to and from Portsmouth, you can bet that snowbirds are flocking. All of the airline’s low-cost tickets are one-way and do not include taxes, fees, checked baggage ($5 per bag), drinks, food, or an assigned seat. But so what?