| Nonstop Flights: Austin to/from Chicago $22-$79 r/t [November-February] â Spirit / United / American Airlines Spirit, United, and American Airlines have round-trip flights from Austin (AUS) to Chicago (ORD) for $22-$79, NONSTOP. Flights November to February. Weekends available. Origin/Destination reversible. Spirit fares are the âcheapestâ but they donât waive change fees, and they also charge bag fees. United fares waive change fees, but still charge a bag fee. American fares waive change fees, and allow for a free carry-on bag. Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal. Patreon supporters receive a recap of all the airfare deals currently available from Austin and San Antonio everyday. We donât charge a subscription fee. Our deal notifications are available for FREE via Instagram, Facebook, Twitter, Telegram, our Webpage, and our E-mail list. If you are paying someone a subscription fee for this content, you are being ripped off. Click for more details and booking links Nonstop Flights: Austin to/from Chicago $22-$79 r/t [November-February] â Spirit / United / American Airlines . | 