Denver International Airport is still struggling with the weather; they have crews working 12-hour shifts as they try to clear the snow. Denver has been hit by some of the worst snowstorms in years, as a result flights have had to be cancelled.

Yesterday saw Frontier Airlines cancel a number of its flights; United Airlines have also done the same. It is not known how long these flights will stay cancelled but both airlines have extended travel waivers for its passengers who were due to fly today or Thursday.

The waivers mean that travelers will now be able to change their flights without paying a fee. 9News.com has been speaking to Denver International Airport spokesperson, Chuck Cannon, he advises travelers to contact the airline that they are travelling with before they make their way to the airport.

Cannon said that crews were working at full speed to try and keep the airport clear, but are battling to keep up as the weather intensifies.