Shares of global airline stocks advanced more than 12% last week, indicating that investors were unfazed by the service outage that temporarily grounded planes in the U.S. United Airlines was the best performer for the week, up 22%, followed by American Airlines (20%) and Frontier Airlines (17%). For the one-month, three-month and six-month periods, a [...] The post Here’s Why Airline Stocks Are Soaring Right Now appeared first on ETF Trends .