Airlines PNG Flight 4684 (CG4682/TOK4684) was a scheduled domestic passenger flight operated by Papua New Guinean airliner Airlines PNG, flying from Jacksons International Airport in Papua New Guinea's capital Port Moresby to Kokoda Airport in Oro Province, Papua New Guinea. On 11 August 2009, the aircraft operating the flight, a de Havilland Canada Twin Otter, crashed into a forest in Kokoda Valley, a popular trekking site in Papua New Guinea, while carrying 13 people in bad weather. A search and rescue operation was conducted by authorities and found the wreckage of the crashed plane on the next day, 12 August 2009. The aircraft was severely damaged, and searchers found no signs of life. Papua New Guinean Search and Rescue Agency then announced that everyone on board was killed instantly in the crash.

PNG Air is an airline based on the grounds of Jacksons International Airport, Port Moresby, Papua New Guinea. It operates scheduled domestic and international flights, as well as contract corporate charter work. Its main base is Jacksons International Airport.