Cheap flights To Union (STL) from $25

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Cheap Flights to Union from $25 One Way, $48 Round Trip

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

Fri, Nov 13 - Mon, Nov 16
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$48 Roundtrip, found 1 day ago
$48
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Nov 13 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $48 found 1 day ago
Sat, Dec 19 - Fri, Dec 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$51 Roundtrip, found 6 hours ago
$51
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Sat, Dec 19 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Dec 25, priced at $51 found 6 hours ago
Fri, Dec 18 - Fri, Dec 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$53 Roundtrip, found 6 hours ago
$53
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Fri, Dec 18 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Dec 25, priced at $53 found 6 hours ago
Wed, Dec 16 - Sat, Dec 19
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$54 Roundtrip, found 1 day ago
$54
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Dec 16 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Dec 19, priced at $54 found 1 day ago
Wed, Nov 11 - Mon, Nov 16
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$56 Roundtrip, found 1 day ago
$56
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Nov 11 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $56 found 1 day ago
Wed, Nov 11 - Wed, Nov 11
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$58 Roundtrip, found 18 hours ago
$58
Roundtrip
found 18 hours ago
Select Frontier Airlines flight, departing Wed, Nov 11 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Nov 11, priced at $58 found 18 hours ago
Fri, Nov 13 - Sat, Nov 14
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$74 Roundtrip, found 4 days ago
$74
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Nov 13 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Nov 14, priced at $74 found 4 days ago
Thu, Nov 12 - Mon, Nov 16
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$98 Roundtrip, found 4 hours ago
$98
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, Nov 12 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $98 found 4 hours ago
Tue, Dec 29 - Fri, Jan 1
MSP
Minneapolis - St. Paul Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 3 hours ago
$117
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Dec 29 from Minneapolis - St. Paul Intl. to Lambert-St. Louis Intl., returning Fri, Jan 1, priced at $117 found 3 hours ago
Thu, Jan 7 - Mon, Jan 11
MSP
Minneapolis - St. Paul Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 4 hours ago
$117
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Thu, Jan 7 from Minneapolis - St. Paul Intl. to Lambert-St. Louis Intl., returning Mon, Jan 11, priced at $117 found 4 hours ago

Union Flight Information

Traveling To
Union
Destination Airport IATA Code
STL
Number of Airlines Serving
Airlines
Frontier Airlines, Southwest Airlines, Delta
Flight Price
$48
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

Dec 3 - Dec 6

3 night stay

Atlanta (ATL) to St. Louis (STL)

Southwest Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $562, price is now $327 per person
$327
per person
found 1 day ago
Hollywood Casino & Hotel St. Louis
3.5-star property

Hollywood Casino & Hotel St. Louis

Nov 26 - Nov 30

4 night stay

Atlanta (ATL) to St. Louis (STL)

Southwest Airlines • Coach

St. Louis (STL) to Atlanta (ATL)

Frontier Airlines • Coach
Price was $463, price is now $368 per person
$368
per person
found 1 day ago
River City Casino & Hotel
4.0-star property

River City Casino & Hotel

Dec 3 - Dec 6

3 night stay

Atlanta (ATL) to St. Louis (STL)

Southwest Airlines • Roundtrip • Coach
Price was $629, price is now $505 per person
$505
per person
found 1 day ago
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Union

When you plan to buy tickets for flights to Union, you don’t have to look any further than Orbitz! We offer bargain rates and low fares on thousands of flights.

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Along with our low prices, Orbitz is well known for exceptional customer care. We make it simple to find the best Union flights for you. If you need to cancel your booking or change your flight plans, simply contact our Customer Service department to make any adjustments.

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If you like the ease of making your travel plans on the move, you’ll love the free Orbitz apps for iPhones, iPads, and Android devices. You can use these apps to review your travel reservations or make a change to your itinerary. Orbitz also offers additional travel assistance such as free mobile alerts that keep you up-to-date about sudden changes to your upcoming flights. You can also browse Orbitz easily on your smartphone by using the mobile version of the website to find budget Union flights.

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 $48 to $117 this week. The most affordable prices for one-way tickets were $25, originating from Atlanta (ATL).
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.