Minneapolis–St. Paul International Airport (MSP) will close its south parallel runway for six weeks starting August 18, 2025, as it begins the second and final phase of a runway safety improvement project. The Metropolitan Airports Commission (MAC), which owns and operates MSP, announced that the closure will affect Runway 12R-30L, located on the south side of Terminal 1. The work is scheduled to be completed by September 26, 2025.
The construction will focus on runway grading, drainage upgrades, shoulder enhancements, and the reconstruction of Taxiway D. Most of this activity will take place at the eastern end of the runway near Highway 5. This phase follows similar work completed in spring.
According to MAC, passengers and residents near the airport may notice temporary changes in flight patterns during this period. After construction concludes at the end of September 2025, the US Federal Aviation Administration (FAA) will return MSP to its previous operational levels.