Rialto Municipal Airport (FAA LID: L67), originally Miro Field, was a general aviation airport three miles (5 km) northwest of Rialto, in San Bernardino County, California, United States.

It was used by private aircraft; no airlines flew into this airport. It was about 12 miles northeast of Ontario International Airport and ten miles west of San Bernardino International Airport. The airport did not have a control tower and averaged 82 operations a day.

An FBO with a flight school and a separate helicopter flight school operated at the airport. There were several aviation related businesses. Warbirds West Air Museum is relocating its warbird collection to the big hangar at the center of the field. The airport cafe is attached to the WWAM hangar. There was an air ambulance business in the southeast part of the airport.

Despite its size compared to nearby airfields (Upland Cable Airport, Corona Municipal Airport, El Monte Municipal Airport, Redlands Municipal Airport and Hemet-Ryan Airport), Rialto was a relatively quiet airport.