$103 Cheap flight deals from Boston (BOS) to Union (STL)
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This Weekend's Flight Deals from Boston to Union
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 $103 One Way, $185 Round Trip from Boston to Union
Prices starting at $185 for return flights and $103 for one-way flights to Union were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Union economy flight packages
The Wildwood Hotel
Apr 26 - May 1
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Oct 16, 2025
The Royal Sonesta Chase Park Plaza St. Louis
Apr 26 - May 1
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Jan 12, 2026
The Knight Center at Washington University
Apr 26 - May 1
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Sep 15, 2025
Union first class flight packages
Hampton Inn By Hilton St Louis Airport
Apr 29 - May 2
Boston (BOS) to St. Louis (STL)
Reviewed on Oct 26, 2025
Sheraton Westport Plaza Hotel St. Louis
Apr 29 - May 2
Boston (BOS) to St. Louis (STL)
Reviewed on Aug 22, 2021
Hilton St. Louis Airport
Apr 29 - May 2
Boston (BOS) to St. Louis (STL)
Reviewed on Dec 30, 2024
More About Flying To Union from Boston
Route Information for Flights from Boston to Union
Origin Airport IATA Code | BOS |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Boston to Union
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Best Deals At Your Fingertips
Orbitz combines low prices on Boston to Union flights with discounts on quality hotels. Using Orbitz’s Display Matrix, you can see all your options and savings easily. With our low price guarantee, you know you have the best deals at your fingertips.
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Union 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.