The Wall Street Journal reports that Delta Airlines is studying U.S. Airways as a potential merger partner. The report also says Delta is considering a takeover of bankrupt American Airlines as well . U.S. Airways announced last week that it was considering a merger with American. The Journal, citing anonymous sources "familiar" with the situation, reports that U.S. Airways is open to being a buyer or a seller," and is waiting to hear from Delta. U.S. Airways is the nation's 5th largest full-service carrier.