$105 Cheap Frontier Airlines flights San Antonio (SAT) to Chicago (ORD)

You can discover cheap round-trip Frontier Airlines flights from $199 from SAT to ORD by sorting your results from “Price (lowest to highest)” on Expedia. Or look for options from $105 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for return or one-way flights to Chicago in January or February. You could find an affordable fare with Frontier Airlines during these off-peak months.

Start searching one to three months ahead of your travel date to find cheap fares on Frontier Airlines flights from San Antonio Intl. Airport (SAT) to O’Hare Intl. Airport (ORD). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct trip from SAT to ORD with Frontier Airlines or any other airlines, check the “Nonstop” filter when searching for flights.

Find Frontier Airlines’s earliest flights from SAT to ORD by checking our “Morning” and “Early Morning” filters. Not only will you arrive sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Catch a Frontier Airlines flight from San Antonio Intl. Airport (SAT) to Chicago, and you’ll probably arrive at O’Hare Intl. Airport (ORD). This is the airline’s primary hub here.

With a rewarding loyalty program, Frontier Airlines is a popular choice for many travelers flying from SAT to ORD. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee will generally apply if you cancel or change your flight more than 24 hours after it’s confirmed. To secure flexible fares, select our “Changes included” and “No cancel fee” boxes while searching for flights. For additional information on modifying or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”