However, Frontier Airlines, for example, warned investors about industry-wide fare discounts and promotions in March.

Spirit Airlines is one of the largest ultra-low-cost carriers in the United States of America, and, indeed, the wider world as a whole. It has been operating for almost 33 years under its current ...

Travel experts have been warning that a year that was initially projected to be profitable for the tourism industry could ...

NBC News’ Hallie Jackson speaks with the CEO of Frontier Airlines about why he's optimistic about the future of domestic air ...