Monroe Regional Airport and Walla Walla Regional Airport are both considered to be?
Monroe Regional Airport (Louisiana) Monroe Regional Airport (IATA: MLU, ICAO: KMLU, FAA LID: MLU) is a public use airport in Ouachita Parish, Louisiana, United States. The airport is owned by the City of Monroe and is located three nautical miles (6 km) east of its central business district.
Sioux Lookout Airport Sioux Lookout Airport (IATA: YXL, ICAO: CYXL) is a regional airport based in Sioux Lookout, Ontario, Canada. The airport opened in 1933. It was, at the time, the second busiest airport in North America next to Chicago Midway International Airport. Today, the airport is a "mini-hub" facilitating travel to and from many northern communities in Northwestern Ontario.