Summer is nearly here, and for many, that means it’s time to start finalizing vacation plans. The good news is that summer air travel doesn’t have to cost a fortune. In fact, according to travel search site Skyscanner, domestic airfare to many U.S. cities is shaping up to be anywhere from 10 percent to 25 percent cheaper than last summer. “Domestic travel has never been more attainable, especially for the summer months, with round-trip fares available for under $300,” said Max Lorber, principal growth manager for Skyscanner. Here are this summer’s 25 cheapest destinations, based on a Skyscanner analysis of flights to and from all 50 states. All prices are for one round-trip economy ticket.