For Chicago-San Diego flights, you can use Chicago Nas Airport, Chicago Rockford Intl. Airport, DuPage Airport, Gary International Airport, Merrill C Meigs Airport, Chicago Midway Intl. Airport, O'Hare Intl. Airport, Chicago Executive - Palwaukee Municipal Airport as departure airport, and Brown Field Municipal Airport, Gillespie Airport, San Diego Intl. Airport, McClellan Palomar Airport, Marine Corps Miramar Airport, Montgomery Gibbs Executive Airport, NAS North Island Airport for arrival.