$83 Cheap flight deals from Chicago (CHI) to O'Fallon (STL)
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This Weekend's Flight Deals from Chicago to O'Fallon
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 $83 One Way, $158 Round Trip from Chicago to O'Fallon
Prices starting at $158 for return flights and $83 for one-way flights to O'Fallon were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
O'Fallon economy flight packages
The Wildwood Hotel
Feb 13 - Feb 15
Chicago (CHI) to St. Louis (STL)
Reviewed on Oct 16, 2025
Hilton St. Louis Airport
Feb 13 - Feb 16
Chicago (CHI) to St. Louis (STL)
St. Louis (STL) to Chicago (CHI)
Reviewed on Dec 30, 2024
Ameristar Casino Resort and Spa
Feb 13 - Feb 15
Chicago (CHI) to St. Louis (STL)
Reviewed on Dec 2, 2025
More About Flying To O'Fallon from Chicago
Route Information for Flights from Chicago to O'Fallon
Origin Airport IATA Code | CHI |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Chicago to O'Fallon
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O'Fallon 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.