The main purpose of this legislation, known as the "Don't Miss Your Flight Act," is to create a grant program that funds improvements to surface transportation infrastructure connecting to airports. The goal is to enhance access to airports, reduce traffic congestion, and improve transportation options for travelers. Key provisions of the act include the establishment of a grant program managed by the Secretary of Transportation. This program will provide financial assistance to states, local governments, and Indian Tribes for projects that connect to public airports.