MidAmerica St. Louis Airport station

MidAmerica St. Louis Airport station is an under construction St. Louis MetroLink station in Mascoutah, Illinois, adjacent to MidAmerica St. Louis Airport, after which the station is named. When opened, this station will be the eastern terminus of the MetroLink system. It is scheduled to open in spring 2025 as part of a 5.2 mi expansion of the Red Line from Shiloh–Scott station.

History
The plan to expand the MetroLink line out to MidAmerica St. Louis Airport received $96 million in funding from the State of Illinois in 2019. The expansion will include a 2.6 mi double-track section, a 2.6 mi single-track section and a passenger station at the end of the alignment at MidAmerica Airport. Design work was completed in the summer of 2022 and a request for proposals was released that November. Construction on the expansion is expected to begin by summer 2023 and be operational by spring 2025.