$117 Cheap flight deals from Boston (BOS) to Southern Illinois (STL)
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This Weekend's Flight Deals from Boston 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 $117 One Way, $230 Round Trip from Boston to Southern Illinois
Prices starting at $230 for return flights and $117 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
The Royal Sonesta Chase Park Plaza St. Louis
Jul 7 - Jul 10
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Jan 12, 2026
The Knight Center at Washington University
Jul 7 - Jul 10
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Sep 15, 2025
The Cheshire
Jul 7 - Jul 10
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on May 4, 2026
More About Flying To Southern Illinois from Boston
Route Information for Flights from Boston to Southern Illinois
Origin Airport IATA Code | BOS |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Boston to Southern Illinois
If you are looking to get guaranteed low prices for Boston to Southern Illinois flights then Orbitz is the place to go. We use cutting edge mobile tools to find the best deals on air tickets and to keep you updated on delays and changes.
Get Package Savings by Booking Flights and Hotels at the Same Time
Using the Orbitz Matrix display, you can see how much you will save on flights from Boston to Southern Illinois if the discount fare is combined with a hotel. You can also look at hotel reviews, photos and maps of the area, so it will be convenient to make your budget travel plans.
Orbitz for Business Helps Corporations save Money
Orbitz can assist all businesses from the small to major corporations with discounts on flights from Boston to Southern Illinois. We fine- tune your needs for Boston to Southern Illinois flights and optimize your plans by assessing your business and coming up with ways for you to save on air tickets.
Using Online Check-In Makes Flying Simple
You can use the Orbitz website to check-in for your flights from Boston to Southern Illinois. You can also make changes to your schedule or even cancel a flight.
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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.