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-mile (8.4 km) expansion of the Red Line from Shiloh–Scott station.

Quick Facts General information, Location ...

MidAmerica St. Louis Airport
General information
Location	MidAmerica St. Louis Airport Mascoutah, Illinois
Coordinates	38°32′56″N 89°48′47″W
Owned by	Bi-State Development Agency
Operated by	Metro Transit
Platforms	1 island platform
Tracks	2
Construction
Structure type	At-grade
Parking	Paid parking nearby
Bicycle facilities	MetroBikeLink Trail
Accessible	Yes
History
Opening	2025 (2025)
Services
Preceding station MetroLink Following station Shiloh–Scott toward Lambert Airport Terminal 1 Red Line Terminus
Location

Close

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.^[1] The expansion will include a 2.6-mile (4.2 km) double-track section, a 2.6-mile (4.2 km) single-track section and a passenger station at the end of the alignment at MidAmerica Airport.^[2] 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.^[3][4]