John Wayne Airport (SNA) in Irvine-Santa Ana, CA is easily accessible by bicycle. Like almost everywhere in Irvine, there are several surface streets with good shoulders or bike lanes that approach the airport covered parking lot entrance. I pedaled by the west end of the airport today on Campus Drive (just 1.5 miles from University of CA Irvine) but I've never parked my bike there to take a plane trip. I have seen a small number of bicycles parked in the covered parking garage in the "motorcycle parking area" where there are a bunch of steel posts to lock up to. I am guessing most of the parked bicycles belong to people who work inside the terminal buildings.
