I am trying to find out the Overnight parking rates for John Wayne Int’l Airport?
$12 for Main Street (farther away, might have to walk or take a terminal bus), $17 terminal. If it is only for one day (24-hours) you can do curbside valet parking for $23 (goes way up after the first day).
If it is long term, you can try the site below for a discounted rate.
http://www.iflyairportparking.com/john-wayne-parking.html
You could also use Supershuttle for $10 each way.
http://www.supershuttle.com
Plane Landing John Wayne Airport, OC