mwadswor-- John Wayne (SNA) is closer to Disneyland but the airport is capped at 10.8 million passengers annually so there will be a need to shift some of these passengers to Ontario as the activity level there approaches the cap. I think Disneyland and northern Orange County is fairly close (30-45 min) to Ontario.
The 'Go Local' report by Landrum & Brown (
http://www.eltoroairport.org/issues/...esentation.pdf ) some interesting information about the number of passengers who considered flying out of other airports and the destinations of passengers arriving at John Wayne. According to the presentation, many of the passengers already take a hotel shuttle to the resorts/hotels in Anaheim.