Of all the airlines I have been checking US Air is the only one that comes close to departing and returning flights that I want. Although I am willing to depart a day early if need be. With US air financial trouble I won't book far ahead however this is my question? If i can get cheap one way tickets for different airlines: One way from Philly to MCO and then another airline MCO to Philly to accomodate my flying times would that be sensible? Or is it more economical and sensible to fly roundtrip?