A concourse extension at Denver International Airport was used by United Airlines for regional planes while work to Concourse B takes place , where a 12-gate regional wing is being demolished .
In early 2018 a temporary concourse extension opened at the east end of A . This will be primarily used by United Airlines for regional planes while work to Concourse B - that requires demolishing a 12-gate regional finger on its east end making way for a second regional jet concourse - takes place .
Denver International Airport