The polar vortex flooding into the US is set to deliver the coldest air on Earth to the northern half of the country, threatening millions with more dangerous winter conditions. Both snow and bitterly ...

Below-average temperatures are predicted for much of the U.S. South, as National Weather Service (NWS) meteorologists warn of plummeting temperatures this weekend and early next week. The dip in ...

American CEO Robert Isom told CNBC a potential merger with rival United would hurt consumers. Isom called the idea of a merger "a nonstarter from the get-go." United CEO Scott Kirby floated the idea ...