Stocks were mostly rising Monday after the S&P 500 and Nasdaq Composite had their worst weeks since early September. The ...

A tie-up of the two ultra-low-cost airlines out of a bankruptcy proceeding would increase scale and bolster competition as long as the planes ran on time.

Budget carrier Spirit Airlines has filed for bankruptcy protection after years of financial losses and failed merger attempts ...

Spirit Airlines, the nation’s top discount carrier that traces its roots to Macomb County, told customers Monday they can book flights and use frequent-flyer points and that employees and vendors will ...