$34 Cheap flight deals from Denver (DEN) to Union (STL)
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This Weekend's Flight Deals from Denver 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 $34 One Way, $59 Round Trip from Denver to Union
Prices starting at $59 for return flights and $34 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
Marriott St. Louis West
Feb 27 - Mar 2
Denver (DEN) to St. Louis (STL)
Reviewed on Aug 13, 2025
Hotel Saint Louis, Autograph Collection
Feb 27 - Mar 2
Denver (DEN) to St. Louis (STL)
Reviewed on Aug 17, 2021
Hampton Inn St. Louis Wentzville
Feb 27 - Mar 2
Denver (DEN) to St. Louis (STL)
Reviewed on Apr 11, 2025
More About Flying To Union from Denver
Route Information for Flights from Denver to Union
Origin Airport IATA Code | DEN |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Denver to Union
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We make it as easy as possible for you to book great deals on flights from Denver to Union. You won’t be forced to compromise on your schedule—you can pick Denver to Union flights that suit your needs.
Flights from Denver
- Denver to Los Angeles
- Denver to Chicago
- Denver to Orlando
- Denver to New York
- Denver to Houston
- Denver to Dallas
- Denver to Miami
- Denver to Atlanta
- Denver to Minneapolis - St. Paul
- Denver to London
- Denver to Austin
- Denver to San Francisco
- Denver to Kansas City
- Denver to Toronto
- Denver to Detroit
- Denver to Charlotte
- Denver to Montreal
- Denver to Santa Ana
- Denver to Edmonton
- Denver to Buenos Aires
Union Airports
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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.