Southwest Airlines® will begin service to and from Colorado Springs on March 11, 2021. The arrival of Southwest Airlines® means additional and more affordable options, making Colorado's small airport even more convenient and hassle-free for visitors, convention attendees and business travelers. SWA will fly five routes from COS with a total of 13 flights per day to: Denver, Chicago Midway, Dallas Love Field, Las Vegas and Phoenix. These five non-stop cities give you access to the entire Southwest Airlines network.