For Chicago-Guadalajara 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 Guadalajara Intl. - Miguel Hidalgo y Costilla Guadalajara Intl. Airport, Guadalajara Railway Station for arrival.