$95 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 $95 One Way, $160 Round Trip from Boston to Union
Prices starting at $160 for return flights and $95 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
Hampton Inn & Suites Clayton/St. Louis-Galleria Area
Jun 4 - Jun 7
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Apr 20, 2022
Angad Arts Hotel St. Louis, Tapestry Collection by Hilton
Jun 4 - Jun 7
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Jan 18, 2026
Ameristar Casino Resort and Spa
Jun 3 - Jun 7
Boston (BOS) to St. Louis (STL)
St. Louis (STL) to Boston (BOS)
Reviewed on Dec 2, 2025
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
Trip-Planning Made Easy
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Discount Boston to Union Flights
Orbitz’s low price guarantee means you get the best fares around. Find the lowest prices for international and domestic tickets and for flights from Boston to Union when you use Orbitz. It’s easy to add activities to your booking, so you can take advantage of all that Union has to offer.
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Flights from Boston
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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.