There are 7 airports in Chicago: O'Hare International Airport, Chicago Union Railway Station, Chicago Rockford International Airport, DuPage Airport, Chicago Midway International Airport, Merrill C Meigs and Chicago Executive Airport.

The best price for a return flight from Seattle to Chicago is €465.88. The average price for a ticket is €559.65

There are 8 airlines that directly fly from Seattle to Chicago: American Airlines, Alaska Airlines, Etihad Airways, Gulf Air, Royal Jordanian, United Airlines, Silk Avia and Southwest Airlines.