Cheap flights To Union (STL) from $19

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Cheap Flights to Union from $19 One Way, $38 Round Trip

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

Wed, Jan 14 - Wed, Jan 21
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$38 Roundtrip, found 4 days ago
$38
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Wed, Jan 14 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Jan 21, priced at $38 found 4 days ago
Wed, Jan 14 - Wed, Feb 4
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$49 Roundtrip, found 5 days ago
$49
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Jan 14 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Feb 4, priced at $49 found 5 days ago
Sat, Jan 17 - Sat, Jan 24
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 Sat, Jan 17 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Jan 24, priced at $58 found 21 hours ago
Thu, Jan 22 - Sun, Jan 25
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$59 Roundtrip, found 13 hours ago
$59
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Thu, Jan 22 from Orlando Intl. to Lambert-St. Louis Intl., returning Sun, Jan 25, priced at $59 found 13 hours ago
Tue, Jan 27 - Fri, Jan 30
PHL
Philadelphia Intl.
STL
Lambert-St. Louis Intl.
$130 Roundtrip, found 4 days ago
$130
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Tue, Jan 27 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Fri, Jan 30, priced at $130 found 4 days ago
Thu, Feb 26 - Mon, Mar 2
TTN
Mercer
STL
Lambert-St. Louis Intl.
$138 Roundtrip, found 6 days ago
$138
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Thu, Feb 26 from Mercer to Lambert-St. Louis Intl., returning Mon, Mar 2, priced at $138 found 6 days ago
Fri, Feb 27 - Sun, Mar 1
IAD
Washington Dulles Intl.
STL
Lambert-St. Louis Intl.
$138 Roundtrip, found 5 days ago
$138
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Feb 27 from Washington Dulles Intl. to Lambert-St. Louis Intl., returning Sun, Mar 1, priced at $138 found 5 days ago
Wed, Jan 21 - Sat, Feb 7
JFK
John F. Kennedy Intl.
STL
Lambert-St. Louis Intl.
$138 Roundtrip, found 1 hour ago
$138
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Jan 21 from John F. Kennedy Intl. to Lambert-St. Louis Intl., returning Sat, Feb 7, priced at $138 found 1 hour ago
Thu, Jan 29 - Sat, Jan 31
DCA
Ronald Reagan Washington National
STL
Lambert-St. Louis Intl.
$141 Roundtrip, found 3 days ago
$141
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Jan 29 from Ronald Reagan Washington National to Lambert-St. Louis Intl., returning Sat, Jan 31, priced at $141 found 3 days ago
Fri, Jan 23 - Fri, Jan 30
LAX
Los Angeles Intl.
STL
Lambert-St. Louis Intl.
$148 Roundtrip, found 4 days ago
$148
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Los Angeles Intl. to Lambert-St. Louis Intl., returning Fri, Jan 30, priced at $148 found 4 days ago

Union Flight Information

Traveling To
Union
Destination Airport IATA Code
STL
Number of Airlines Serving
Airlines
Frontier Airlines, Delta
Flight Price
$38
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

Jan 17 - Jan 19

2 night stay

Atlanta (ATL) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $326, price is now $172 per person
$172
per person
found 19 hours ago
Hilton Garden Inn Chesterfield
3.0-star property

Hilton Garden Inn Chesterfield

Jan 17 - Jan 19

2 night stay

Atlanta (ATL) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $249, price is now $174 per person
$174
per person
found 19 hours ago
The Knight Center at Washington University
2.5-star property

The Knight Center at Washington University

Jan 17 - Jan 19

2 night stay

Atlanta (ATL) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $286, price is now $203 per person
$203
per person
found 19 hours ago
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Union

Save more on flights to Union while making top-quality travel arrangements. At Orbitz we provide access to low cost flights, hotel lodgings and other discounts, along with superior customer service and an unbeatable satisfaction guarantee.

Compare And Book Discount Flights to Union

Now it is easier than ever to find a discount Union flight. Orbitz users can compare airfares for both international and domestic flights and can quickly determine the best hotels and car rental companies to use. You may also check out hotel and other reviews along with a number of travel tips, making your visit to an unfamiliar destination enjoyable and hassle-free.

Use Your Mobile Phone To Secure A Low Cost Flight To Union

We now offer free apps for the most commonly used mobile devices. You can use your mobile phone to share relevant information pertaining to your trips, view images of local lodgings and take advantage of hotel and car rental discounts that may be available only to mobile device users.

Boost Your Frequent Flyer Rewards

You even retain your ability to earn frequent flier points and rewards when purchasing your tickets with Orbitz for Union flights. Enter your frequent flyer information into your Orbitz profile to start earning rewards.

You will find that Orbitz is a very low cost, yet very effective travel planner. Free updates via your mobile phone device will help to keep you and all relevant parties informed of important flight updates. With access to unbeatable sales on all travel essentials, Orbitz makes booking an affordable flight to Union a breeze.

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 $38 to $148 this week. The most affordable prices for one-way tickets were $19, 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.