$123 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 $123 One Way, $250 Round Trip from Boston to Southern Illinois
Prices starting at $250 for return flights and $123 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 Wildwood Hotel
Sep 12 - Sep 19
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Jul 25, 2026
The Cheshire
Sep 12 - Sep 19
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Jul 25, 2026
The Knight Center at Washington University
Sep 12 - Sep 19
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
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
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Take advantage of low fares on Boston to Southern Illinois flights and vacation packages
Orbitz has the best prices available on flights from Boston to Southern Illinois. Take advantage of our low fare sales and discounts and begin to plan your next trip. We also give you great savings on hotels, car rentals, and vacation packages.
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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.