The massive winter weather system that will impact 235 million people across more than 40 states is wreaking havoc on air travel as flight delays and cancellations are impacting airports across the co...

More than 4,000 flights were cancelled in the US as a massive winter storm dumped snow and freezing rain from New Mexico to North Carolina as it swept across the United States towards the northeast.

More than 10,800 flights were canceled on Sunday, according to flight-tracking site FlightAware.