$69 Cheap flight deals from Chicago (CHI) to Frontenac (STL)
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This Weekend's Flight Deals from Chicago to Frontenac
This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Airfares from $69 One Way, $137 Round Trip from Chicago to Frontenac
Prices starting at $137 for return flights and $69 for one-way flights to Frontenac were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Frontenac economy flight packages
The Wildwood Hotel
Jul 3 - Jul 5
Chicago (ORD) to St. Louis (STL)
St. Louis (STL) to Chicago (ORD)
Reviewed on Feb 24, 2026
Ameristar Casino Resort and Spa
Jul 3 - Jul 5
Chicago (ORD) to St. Louis (STL)
St. Louis (STL) to Chicago (ORD)
Reviewed on Dec 2, 2025
Landing Furnished Apartments - Central West End
Jul 3 - Jul 5
Chicago (ORD) to St. Louis (STL)
St. Louis (STL) to Chicago (ORD)
More About Flying To Frontenac from Chicago
Route Information for Flights from Chicago to Frontenac
Origin Airport IATA Code | CHI |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Chicago to Frontenac
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Our iPhone and Android mobile apps can be used to compare and book flights from Chicago to Frontenac. These apps are perfect for checking the status of flights, gate and baggage claims details, car rental rates, and for receiving alerts on special savings that are exclusive to mobile users. Mobile app users can even score great rates when booking hotel rooms. You can compare hotels, virtually view photo galleries, and check out user reviews using the app, as well as find out which ones are closest to you.
Orbitz also offers free travel updates that are sent to your email or mobile phone that notifies you of booking changes, disruptions in service, or delayed flights.
Increase Your Rewards While Enjoying Super Low Rates
Boost your points or miles for your frequent flyer program on certain Chicago to Frontenac flights. Simply provide your frequent flyer information when booking flights from Chicago to Frontenac with Orbitz and get both a low fare and travel rewards. You can enter this information in your Orbitz account profile for easy remembering in future bookings.
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Frontenac Airports
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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.
Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.
Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.