Flight Fare Fights United and American have round-trip flights from Houston (IAH) to Chicago (ORD) for $87-$107, NONSTOP. Cheapest Flights TUE-WED+SAT from September to December. Friday flights are available here and there for only $5 more. Southwest is matching out of Hobby (HOU) and Midway (MDW). Their price is $100 +/- $20. Round-trip. Nonstop. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Leave a Reply Cancel ReplyYour email address will not be published.CommentName* Email* Website CAPTCHA Code * Notify me of follow-up comments by email. Notify me of new posts by email.