John Glenn Columbus International Airport (IATA: CMH, ICAO: KCMH, FAA LID: CMH) is an international airport located 6 miles (9.7 km; 5.2 nmi) east of downtown Columbus, Ohio. Formerly known as Port Columbus International Airport, it is managed by the Columbus Regional Airport Authority, which also oversees operations at Rickenbacker International Airport and Bolton Field. The airport code "CMH" stands for "Columbus Municipal Hangar," the original name of the airport.

John Glenn Columbus International Airport is primarily a passenger airport. It provides 148 non-stop flights to 31 airports via nine airlines daily.

On May 25, 2016, the Ohio General Assembly passed a bill to rename the airport from Port Columbus International Airport to its current name, in honor of astronaut and four-term U.S. senator John Glenn. The name change was unanimously approved by the airport's nine-member board on May 24, 2016. Ohio Governor John Kasich signed the bill into law on June 14, 2016, with the name change becoming official 90 days later. On June 28, 2016, a celebration of the renaming was held and new signage bearing the airport's new name was unveiled.