United Airlines announced, on Tuesday, the addition of 35 flights at Denver International Airport. United will also be occupying an additional 12 gates as well. The goal is to have these new flights and gates ready for flyers by the middle of 20-24. These new additional flights will bring the total number of United Gates at Denver International to 90 making them the largest airline at the airport. Frontier and Southwest Airlines may need to do some gate switching to make this United Expansion possible.