For San Salvador-Chicago flights, you can use El Salvador Intl. - Saint Oscar Arnulfo Romero y Galdamez Airport, Ilopango Airport as departure airport, and 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 for arrival.