Grand Forks International Airport — Grand Forks, United States

Grand Forks International Airport, coded GFK, serves Grand Forks, North Dakota, and is notable for its close relationship with the University of North Dakota's aviation program, one of the largest collegiate flight training operations in the United States. Beyond passenger service connecting to hubs like Minneapolis and Denver, GFK shares facilities with Grand Forks Air Force Base operations historically and supports a significant volume of flight training traffic alongside commercial arrivals. The airport's runways and infrastructure are built to accommodate this mixed use, making GFK busier in operational counts than its passenger numbers alone might suggest. Its location in the Red River Valley ties it to the region's agricultural economy as well.