Cheap flights To Union (STL) from $20

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Cheap Flights to Union from $20 One Way, $38 Round Trip

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

Wed, Dec 2 - Wed, Dec 2
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$38 Roundtrip, found 2 days ago
$38
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Dec 2 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Dec 2, priced at $38 found 2 days ago
Wed, Sep 30 - Mon, Oct 5
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$43 Roundtrip, found 3 days ago
$43
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Sep 30 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Oct 5, priced at $43 found 3 days ago
Mon, Oct 5 - Wed, Oct 7
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$44 Roundtrip, found 10 hours ago
$44
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Mon, Oct 5 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Oct 7, priced at $44 found 10 hours ago
Wed, Nov 11 - Fri, Nov 13
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 Wed, Nov 11 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Nov 13, priced at $48 found 1 day ago
Mon, Oct 5 - Mon, Oct 12
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$49 Roundtrip, found 1 day ago
$49
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Oct 5 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Oct 12, priced at $49 found 1 day ago
Fri, Oct 9 - Mon, Oct 12
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$53 Roundtrip, just found
$53
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Oct 9 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Oct 12, priced at $53 just found
Thu, Oct 22 - Fri, Oct 23
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$64 Roundtrip, found 3 hours ago
$64
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, Oct 22 from Orlando Intl. to Lambert-St. Louis Intl., returning Fri, Oct 23, priced at $64 found 3 hours ago
Mon, Nov 9 - Mon, Nov 16
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$88 Roundtrip, found 3 days ago
$88
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Nov 9 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $88 found 3 days ago
Tue, Oct 6 - Tue, Oct 6
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$112 Roundtrip, found 5 days ago
$112
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Oct 6 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Tue, Oct 6, priced at $112 found 5 days ago
Wed, Nov 4 - Wed, Nov 11
BWI
Baltimore Washington Intl. Thurgood Marshall
STL
Lambert-St. Louis Intl.
$115 Roundtrip, found 4 days ago
$115
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Wed, Nov 4 from Baltimore Washington Intl. Thurgood Marshall to Lambert-St. Louis Intl., returning Wed, Nov 11, priced at $115 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.
Larkspur Landing Extended Stay Suites St. Louis Riverport - Airport West
3.0-star property

Larkspur Landing Extended Stay Suites St. Louis Riverport - Airport West

Oct 14 - Oct 17

3 night stay

Boston (BOS) to St. Louis (STL)

American Airlines • Coach

St. Louis (STL) to Boston (BOS)

Southwest Airlines • Coach
Price was $611, price is now $519 per person
$519
per person
found 1 day ago
The Cheshire
4.0-star property

The Cheshire

Oct 14 - Oct 17

3 night stay

Boston (BOS) to St. Louis (STL)

American Airlines • Coach

St. Louis (STL) to Boston (BOS)

Southwest Airlines • Coach
Price was $835, price is now $700 per person
$700
per person
found 1 day ago
Moonrise Hotel
4.0-star property

Moonrise Hotel

Oct 14 - Oct 17

3 night stay

Boston (BOS) to St. Louis (STL)

American Airlines • Coach

St. Louis (STL) to Boston (BOS)

Southwest Airlines • Coach
Price was $806, price is now $704 per person
$704
per person
found 1 day ago
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Union

Get the absolute lowest prices on flights to Union by shopping with Orbitz. Orbitz is the most efficient travel planner around, allowing you to search, compare and book discount domestic and international flights fast. With cutting-edge mobile tools and access to frequent flier rewards programs, we have everything you need for both your routine and holiday excursions.

Book Your Flight To Union Using Your Mobile Device

New mobile app tools enable those with hand-held devices to scout out the best bargains and to secure tickets from any location. If you have an iPhone, iPad or Android device, you may take advantage of special discounts, only available to mobile device customers, when you book hotel rooms or car rentals on the same day as booking Union flights.

Avoid Check-In Hassles When Traveling On Flights to Union

Orbitz also provides an array of resources that can help you eliminate most check-in hassles. Detailed baggage information is continually available for Union flights. Mobile apps can also be used to share travel itineraries with family members or business associates.

Keeping Everyone Up To Date

When you download the free Orbitz mobile phone app, you can get regular and free flight updates. These will keep you informed of important scheduling changes. Updates can even be sent to several contacts, helping to keep everyone current on anticipated arrival times and all other relevant flight details.

Orbitz makes traveling on a budget very easy to do. We provide everything you need to plan your ideal trip from start to finish. Getting there and back again is a snap when you book your Union flight using Orbitz.

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 $115 this week. The most affordable prices for one-way tickets were $20, 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.