$95 Cheap flight deals from Philadelphia (ILG) to Southern Illinois (STL)
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This Weekend's Flight Deals from Philadelphia to Southern Illinois
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 $95 One Way, $169 Round Trip from Philadelphia to Southern Illinois
Prices starting at $169 for return flights and $95 for one-way flights to Southern Illinois were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Southern Illinois economy flight packages
Ameristar Casino Resort and Spa
Sep 12 - Sep 15
Philadelphia (PHL) to St. Louis (STL)
Reviewed on Jul 30, 2025
The Cheshire
Sep 12 - Sep 15
Philadelphia (PHL) to St. Louis (STL)
Reviewed on Aug 7, 2025
More About Flying To Southern Illinois from Philadelphia
Route Information for Flights from Philadelphia to Southern Illinois
Origin Airport IATA Code | ILG |
|---|---|
Destination Airport IATA Code | STL |
Distance | 811 mi |
Direct Flight Airlines | American Airlines, Qatar Airways, Southwest Airlines, Iberia, British Airways |
Earliest Flight Arrival | 2:35PM UTC |
Latest Flight Arrival | 1:47AM UTC |
Philadelphia to Southern Illinois
Getting a spectacularly low fare on Philadelphia to Southern Illinois flights is always possible when you use Orbitz as your personal travel planner. Orbitz is your essential travel resource for low cost flights from Philadelphia to Southern Illinois, discount hotel accommodations, cheap car rentals, and more.
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Our free cutting-edge mobile apps for iPad, Android, and iPhone make it easy to find the best fares when researching and booking flights from Philadelphia to Southern Illinois. You can also use the apps to check your flight status, find baggage claims details, and get exclusive mobile discount rates on car rentals and hotels.
Earn Miles and Points for Your Frequent Flyer Program
Build up points or miles for your frequent flyer plan with qualifying Philadelphia to Southern Illinois flights. Simply add your frequent flyer number when booking your domestic or international flights or enter the numbers in your Orbitz account profile to automatically add them to your bookings.
Flight Alerts Take the Hassle out of Travel
You can get email, SMS text, or voicemail updates regarding any major changes to your flights from Philadelphia to Southern Illinois. These free alerts can also be sent to as many as six additional contacts, ensuring that your friends, colleagues, or family are aware of changes to your arrival time.
Stay in Your Budget and Still Get Great Accommodations
Orbitz shoppers can access affordable vacation packages and have the option of booking their departure and arrival flights through different airlines, making travel less costly and more convenient. The best prices on flights from Philadelphia to Southern Illinoisare always found on Orbitz.
Flights from Philadelphia
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- Philadelphia to Denver
- Philadelphia to Charlotte
- Philadelphia to Dallas
- Philadelphia to London
- Philadelphia to Toronto
- Philadelphia to Rome
- Philadelphia to Detroit
- Philadelphia to Minneapolis - St. Paul
- Philadelphia to Montreal
- Philadelphia to Indianapolis
- Philadelphia to Kansas City
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- Philadelphia to New York
- Philadelphia to Beijing
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.