(Reuters) - Boeing Co's (BA.N) proposal to develop a so-called space taxi for NASA astronauts includes a seat for paying tourists to fly to the International Space Station, the company's program manager said on Wednesday, a first for a U.S. space program. The $4.2 billion, five-year contract allows Boeing to sell rides to tourists, Boeing Commercial Crew Program Manager John Mulholland told Reuters, adding that the price would be competitive with what the Russian space agency now charges to fly tourists to the orbital outpost. "Part of our proposal into NASA would be flying a Space Adventures spaceflight participant up to the ISS," Mulholland said, referring to a Virginia-based space tourism company that brokers travel aboard Russian Soyuz capsules. Now that Boeing has won a share of NASA's space taxi contract, "we hope ... to start working with the ISS program to make it happen," he said. "We think it would be important to help spur this industry." via Reuters.