To find the return flight distance between Napa to San Francisco via Carmel, Lake Tahoe, Hearst Castle Road, Marina, start with entering the locations in the control and click on Return Flight Distance. You can also add multiple destinations in between while returning from a location. If you are not aware of the routes, you can check the
Napa to Carmel Route via Carmel, Lake Tahoe, Hearst Castle Road, Marina.