JetSmarter now offers twice as many free flights as it adds the Citation and Challenger 300 to its JetDeals. Asalways JetDeals are free for members. Citation X seats 8 passengers, features superior amenities, and is the fastest private jet on the market. The super mid-size Citation X covers one mile every six seconds. Challenger seats 9 passengers, boasts a spacious cabin and features a state-of-the-art electronic system. The Challenger 300 offers more space than any other aircraft in the super mid-size category.