
$59 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 $59 One Way, $117 Round Trip from Chicago to Frontenac
Prices starting at $117 for return flights and $59 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
Aug 21 - Aug 23
Chicago (ORD) to St. Louis (STL)
Reviewed on Feb 24, 2026

Ameristar Casino Resort and Spa
Aug 21 - Aug 23
Chicago (ORD) to St. Louis (STL)
Reviewed on Dec 2, 2025

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
Orbitz has your discount air ticket deals for flights from Chicago to Frontenac. The guaranteed low prices from flights and hotels to car rentals and vacation packages make Orbitz the perfect travel website for budget trip planning.
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Orbitz Keeps You Up-to-Date With Instant Flight Alerts
While Orbitz gives you access to cheap tickets for Chicago to Frontenac flights, the travel site also offers free email, voice, or text message alerts to keep you informed of any abrupt changes or delays that affect your travel. You can even choose to have the alerts sent to up to six of your mobile or email contacts to keep your friends in the loop.
Bargain Chicago to Frontenac Flights With Mobile Apps
Download the cutting-edge Orbitz app for either Android or iPhone, and use it to check on the status of your upcoming flights from Chicago to Frontenac at any time. These apps also make it easy for you to book discount hotel rates in your destination city and check for deals on future Chicago to Frontenac flights.
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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.


