$66 Cheap flight deals from Philadelphia (ILG) to O'Fallon (STL)
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This Weekend's Flight Deals from Philadelphia 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 $66 One Way, $139 Round Trip from Philadelphia to O'Fallon
Prices starting at $139 for return flights and $66 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
Comfort Suites Rolla
Mar 28 - Apr 5
Philadelphia (PHL) to St. Louis (STL)
Reviewed on Feb 4, 2026
More About Flying To O'Fallon from Philadelphia
Route Information for Flights from Philadelphia to O'Fallon
Origin Airport IATA Code | ILG |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Philadelphia 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.