Modesto City-County Airport Modesto City-County Airport (MOD) in Modesto, California is 73 miles from Arnold. MOD receives flights from Reno-Tahoe International Airport and San Francisco International Airport. United Airlines (SkyWest) currently offers round-trip flights to San Francisco (SFO) daily. Ground transportation to and from MOD is offered through car rental companies Hertz and Avis, with some hotels offering a shuttle service to registered guests. Taxi operators and limousine services may be summoned via telephone near the baggage claim area in the terminal.