A winter storm warning in Denver has led to the cancellations of all flights between Tulsa and Denver on Saturday.
A powerful winter storm was moving across Colorado, closing almost all of the state's major highways west of Denver and virtually shutting down the airport.
Denver International Airport cancelled over 650 flights on Saturday.
The National Weather Service is forecasting Denver and the mountains could get between two and four feet of snow by Sunday.
United and Southwest Airlines, who have direct flights between Tulsa and Denver suggest calling ahead before going to Tulsa International Airport on Sunday to get the latest flight information.