What travelers should know as a polar vortex heads towards the United States, including how airlines and hotels are responding, and experts on whether you should cancel your trip.

What is polar vortex and how much snow is expected in US? A winter storm linked to polar vortex disruption has impacted ...

Getting your Trinity Audio player ready... More than 500 flights were delayed or canceled at Denver International Airport on Monday as a polar vortex continued to freeze Colorado. There were 529 ...