A U.S. Supreme Court justice on Saturday night denied a last-ditch effort by a group of consumers and travel agents to stop the merger of American Airlines and US Airways, Reuters reported yesterday. The application was denied by Justice Ruth Bader Ginsburg, the court's public information office said. The combination of American's parent, AMR Corp, and US Airways Group would create the world's largest carrier and follow last month's resolution of antitrust objections by the U.S. Department of Justice. In their appeal to the Supreme Court, plaintiffs led by California resident Carolyn Fjord warned that "irreparable injury" could be caused to the domestic airline industry if the deal goes ahead as planned. They fear the merger will drive air travel prices up and service down and make planes more crowded. The merger is expected to be consummated before the opening of U.S. securities markets today. A federal judge on Friday rejected the previous attempt by the group to stop the merger.