If you are looking to book flights to Chicago you have two options for airports The larger and more modern O'Hare International Airport (ORD) as well as the more affordable Midway International Airport (MDW). O'Hare lies on the northwestern end of Chicago and has direct flights to more than 200 locations around the world. The airport was once referred to as being the "busiest square mile of land in the world", Midway is now mostly served through low-cost carriers. If you're looking for flights to Chicago another alternate for ORD as well as MDW can be the Gary/Chicago international airport (GYY). It is technically located within Gary, Indiana, the airport is only 30 minutes away from downtown Chicago and is a third alternative for travelers.