Oceanside Municipal Airport, also known as the Bob Maxwell Memorial Field, is a public airport in Oceanside, California, United States. It is located two miles (3 km) northeast of the downtown Oceanside, between California State Route 76 and the San Luis Rey River bike path. The airport covers 43 acre and has one runway. It is mostly used for general aviation. The airport is operated and managed by Airport Property Ventures. Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Oceanside Municipal Airport is assigned OKB by the FAA and OCN by the IATA. The airport's ICAO identifier is KOKB. The FAA identifier OCN belongs to the Oceanside VORTAC 4 miles west-northwest of the Oceanside Airport.