Grand Lake Regional Airport (IATA: NRI, FAA LID: 3O9) is a privately owned, public use airport in Delaware County, Oklahoma, United States. It is located on Monkey Island, a peninsula on the northern shore of Grand Lake o' the Cherokees. The airport is nine nautical miles (10 mi, 17 km) southeast of Afton, a city in Ottawa County, Oklahoma.

This airport was included in the National Plan of Integrated Airport Systems for 2007–2011, which categorized it as a general aviation facility.