| Nonstop Flights: San Antonio or Austin to/from Chicago $81-$118 r/t [July-November] â American Airlines / United Due to the covid-19 pandemic, we do not recommend booking departures between May and June. This fare has departures later in the year. American Airlines and United have round-trip flights from San Antonio or Austin (SAT) to Chicago (ORD) for $81-$118, NONSTOP. Flights July to November. Weekends available. Origin/Destination reversible. Note: Carry-on bag is allowed for free on American Airlines but NOT United. United basic economy charges a fee for a carry-on bag. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate. Like what we do? Consider becoming a Patreon supporter for our daily airfare recap. Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal. We donât charge a subscription fee. All of 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 our content, you are being ripped off. Read More Nonstop Flights: San Antonio or Austin to/from Chicago $81-$118 r/t [July-November] â American Airlines / United . | 