$109 Cheap flight deals from Portland (PDX) to O'Fallon (STL)
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This Weekend's Flight Deals from Portland 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 $109 One Way, $229 Round Trip from Portland to O'Fallon
Prices starting at $229 for return flights and $109 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
Mar 20 - Mar 24
Portland (PDX) to St. Louis (STL)
Reviewed on Oct 16, 2025
The Cheshire
Mar 20 - Mar 24
Portland (PDX) to St. Louis (STL)
Reviewed on Sep 2, 2025
Angad Arts Hotel St. Louis, Tapestry Collection by Hilton
Mar 20 - Mar 24
Portland (PDX) to St. Louis (STL)
Reviewed on Jan 18, 2026
More About Flying To O'Fallon from Portland
Route Information for Flights from Portland to O'Fallon
Origin Airport IATA Code | PDX |
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Destination Airport IATA Code | STL |
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Portland to O'Fallon
Orbitz has your discount air ticket deals for flights from Portland to O'Fallon. 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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While Orbitz gives you access to cheap tickets for Portland to O'Fallon 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 Portland to O'Fallon Flights With Mobile Apps
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Portland Airports
O'Fallon Airports
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.