Cheap flights To Union (STL) from $24

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Cheap Flights to Union from $24 One Way, $57 Round Trip

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Fri, Feb 20 - Mon, Feb 23
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$57 Roundtrip, found 17 hours ago
$57
Roundtrip
found 17 hours ago
Select Frontier Airlines flight, departing Fri, Feb 20 from Orlando Intl. to Lambert-St. Louis Intl., returning Mon, Feb 23, priced at $57 found 17 hours ago
Wed, Feb 25 - Sat, Feb 28
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$57 Roundtrip, found 3 hours ago
$57
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Wed, Feb 25 from Orlando Intl. to Lambert-St. Louis Intl., returning Sat, Feb 28, priced at $57 found 3 hours ago
Wed, Feb 18 - Sat, Feb 21
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$58 Roundtrip, found 21 hours ago
$58
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Wed, Feb 18 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Feb 21, priced at $58 found 21 hours ago
Sat, Feb 21 - Wed, Feb 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$59 Roundtrip, found 17 hours ago
$59
Roundtrip
found 17 hours ago
Select Frontier Airlines flight, departing Sat, Feb 21 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Feb 25, priced at $59 found 17 hours ago
Fri, Feb 20 - Sat, Feb 28
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$64 Roundtrip, found 16 hours ago
$64
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Fri, Feb 20 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Feb 28, priced at $64 found 16 hours ago
Fri, Feb 27 - Fri, Mar 6
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$64 Roundtrip, found 1 day ago
$64
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Feb 27 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Mar 6, priced at $64 found 1 day ago
Wed, Feb 18 - Sat, Feb 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$128 Roundtrip, found 5 days ago
$128
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Feb 18 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sat, Feb 28, priced at $128 found 5 days ago
Wed, Feb 25 - Wed, Mar 4
IAH
George Bush Intercontinental
STL
Lambert-St. Louis Intl.
$139 Roundtrip, found 3 days ago
$139
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Feb 25 from George Bush Intercontinental to Lambert-St. Louis Intl., returning Wed, Mar 4, priced at $139 found 3 days ago
Wed, Feb 25 - Wed, Mar 4
LAX
Los Angeles Intl.
STL
Lambert-St. Louis Intl.
$151 Roundtrip, found 2 days ago
$151
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Feb 25 from Los Angeles Intl. to Lambert-St. Louis Intl., returning Wed, Mar 4, priced at $151 found 2 days ago
Sat, Feb 28 - Tue, Mar 3
JFK
John F. Kennedy Intl.
STL
Lambert-St. Louis Intl.
$151 Roundtrip, found 3 days ago
$151
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Feb 28 from John F. Kennedy Intl. to Lambert-St. Louis Intl., returning Tue, Mar 3, priced at $151 found 3 days ago

Union Flight Information

Traveling To
Union
Destination Airport IATA Code
STL
Number of Airlines Serving
Airlines
Frontier Airlines
Flight Price
$57
Earliest Departing Flight
Latest Departing Flight

Book Your Flight & Hotel Together & Save

Union economy flight packages

Price found within the past 48 hours. Click for updated prices.
The Wildwood Hotel
3.5-star property

The Wildwood Hotel

Mar 12 - Mar 19

7 night stay

San Juan (SJU) to St. Louis (STL)

American Airlines • Non-stop • Coach

St. Louis (STL) to San Juan (SJU)

Frontier Airlines • Non-stop • Coach
Save 100% on your flight
Price was $1,233, price is now $680 per person
$680
per person
found 1 day ago
The Cheshire
4.0-star property

The Cheshire

Mar 12 - Mar 19

7 night stay

San Juan (SJU) to St. Louis (STL)

American Airlines • Non-stop • Coach

St. Louis (STL) to San Juan (SJU)

Frontier Airlines • Non-stop • Coach
Price was $1,193, price is now $861 per person
$861
per person
found 1 day ago
Hilton Garden Inn Chesterfield
3.0-star property

Hilton Garden Inn Chesterfield

Mar 12 - Mar 19

7 night stay

San Juan (SJU) to St. Louis (STL)

American Airlines • Non-stop • Coach

St. Louis (STL) to San Juan (SJU)

Frontier Airlines • Non-stop • Coach
Price was $961, price is now $733 per person
$733
per person
found 1 day ago
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Union

Finding cheap flights to Union is easy when you have Orbitz at your fingertips. Not only does Orbitz offer great deals on Union flights, but we also include some special extras to make booking a breeze. Just check out our:

Mobile Site and Apps

With Orbitz’s mobile site, m.orbitz.com, you can book your flights to Union through your smartphone or tablet’s Web browser. Plus, our free downloadable apps for Android and iPhone mean it’s just a simple click to access your flight updates and alerts. You can even book exclusive mobile-only deals on hotels to go with your flights to Union—even on the same day.

Pick and Choose or Book Full Vacation Packages

Don’t just be satisfied with great deals on Union flights—go for the full package! With Orbitz, you can also find fantastic savings on the perfect hotel, car rental, cruise, and even activities, so you don’t waste your trip waiting in line but have the time to enjoy your trip. Pick and choose the add-ons you need, or book an entire vacation package for greater overall discounts.

Rewards That Are Miles Better

Booking directly with an airline earns you air miles or points, and you can get those same rewards with booking on Orbitz too. When you book qualifying flights to Union with Orbitz, just add in your frequent flyer number during your online booking and your details will be sent to your program.

Great Deals Every Day

Add in our extra savings on packages, free nights, and other discounts, and you know you are in good hands.

Frequently asked questions

Which airlines fly to Union?
With 20 airlines to pick from, finding the ideal flight that suits your travel dates and budget will be a breeze. Lambert-St. Louis Intl. Airport (STL) is a major gateway to Union and where you'll likely be touching down. These well-known international airlines are ready to take you there:

  • Air Canada - 35 flights to Union per month
  • Frontier Airlines - 17 flights to Union per month
  • Lufthansa - 3 flights to Union per month

How much is a flight to Union?
If you're hunting down a return flight, fares ranged from $57 to $151 this week. The most affordable prices for one-way tickets were $24, originating from Denver (DEN).
How to book the cheapest flight to Union?
Scoring cheap flights to Union is as easy as booking your ticket with Orbitz. But if you'd love to make sure you're nabbing the best flight deals around, here are a few tips your budget will love:

  • Consider departing from or arriving at nearby airports for a cheaper fare. Enter your preferred departure and arrival points in the form fields, then select the 'Nearby airports' function below. It will list the available options.
  • If your plans aren't etched in stone, click on the 'Show flexible dates' link to see the flight deals across different departure dates. Go with any suitable cheaper fare that pops up.
  • Hit 'Show options' to fine tune your search results. You can pick your preferred seating class and airline here. Under 'Sort & Filter' to the left, you can even specify whether you'd like to fly in the morning, afternoon or evening.
  • Book your airfare as soon as you've decided on your travel dates. While it does happen now and then, airline tickets rarely get more affordable as your date of departure gets closer.
  • Consider combining your flights, hotels and car rentals into one convenient package deal to stretch your budget even further.
  • Don't travel during the busy season if you can. By avoiding summer and school vacations, you can make amazing savings on your airfare.

What is the best time to book a flight to Union?
Snap up a bargain and book your seats to Union in January. If you've missed this month, fear not. February and August often have low airfares as well. Just make sure you don't snooze on a sale — cheap flights come and go in the blink of an eye!
What day of the week is the cheapest to book a flight to Union?
Make a booking on a Tuesday, Wednesday or Saturday. Typically, these are the cheapest days of the week to purchase airfares to Union. The vacation of your dreams starts with a great flight deal!
What is the cheapest day of the week to fly to Union?
If you're looking for cheap flights to Union, leave earlier in the week. Orbitz data from 2020 shows Monday is the cheapest day to jet off, followed by Tuesday. Saturday has the most expensive fares, so avoid this day and do your bank account a favor.
What is the cheapest month to fly to Union?
To book cheap flights to Union, you should pack your bags and take off in August. Orbitz data has found that this is generally the best month to save loads on your fare. If you want to jet to Union in June, be aware that this is the least affordable time of year to take a trip.
Which airlines allow free cancellation?
When searching for flights on Orbitz, click on "Filter by flexible change policies." This filter will show you all the airlines offering free cancellation and no change fees. Relax knowing that if things change, your flight can too.
What do I need for the flight to Union?
There's nothing more enjoyable than flying off to a cool new destination, but it's wise to be prepared. This list of useful tips will help get your journey started on the right foot:

  • Before you step foot on the plane, you'll need to show proof of identification, such as a passport. You'll also need your boarding pass. If you're traveling with the kids, check with your airline about which documents they may need.
  • To keep you busy on your short trip to Union, download some new music or stock up the audiobook library on your tablet. Food can also be a welcome distraction while in the air, so maybe even bring some light snacks.
  • It can get very cool on the plane. If you don't want to shiver your way through the flight, dress in layers.

How do I get cheap first-class/business deals to Union?
Smart travelers know how to find first or business-class airfares to Union without the steep price tag. You can do the same with these helpful tips:

  • Be more flexible with your travel dates and hold out for deals on first or business-class airfares.
  • A lot of low-cost airlines nowadays offer superb business or premium-class seating without the pricey fees.
  • Make a bid for an upgrade. Some carriers hold online auctions that let you put down a price for a seat up the front. You may also be able to upgrade with points earned through a loyalty program.

What is the best time to go to Union?
If you want to immerse yourself in the culture of Union in the busy season, April, May and June are the prime months to visit. June 20 signals the start of summertime in the Northern Hemisphere and is a fantastic time to travel if you delight in the open air. During this time of year, average daily temperatures typically range from 65 ºF to 90 ºF.

More to Explore

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.