Cheap flights To Union (STL) from $28

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Cheap Flights to Union from $28 One Way, $66 Round Trip

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

Wed, May 20 - Wed, May 20
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$66 Roundtrip, found 5 hours ago
$66
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Wed, May 20 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, May 20, priced at $66 found 5 hours ago
Wed, Mar 11 - Wed, Mar 18
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$69 Roundtrip, found 3 days ago
$69
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Mar 11 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Mar 18, priced at $69 found 3 days ago
Mon, Apr 20 - Sat, Apr 25
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$71 Roundtrip, found 1 day ago
$71
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Apr 20 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Apr 25, priced at $71 found 1 day ago
Sat, May 9 - Fri, May 15
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$72 Roundtrip, found 3 days ago
$72
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, May 9 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, May 15, priced at $72 found 3 days ago
Wed, Mar 18 - Mon, Mar 23
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$73 Roundtrip, found 11 hours ago
$73
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Wed, Mar 18 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Mar 23, priced at $73 found 11 hours ago
Wed, Mar 18 - Sat, Mar 21
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$75 Roundtrip, found 12 hours ago
$75
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Wed, Mar 18 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Mar 21, priced at $75 found 12 hours ago
Fri, Apr 17 - Mon, Apr 20
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$108 Roundtrip, found 3 days ago
$108
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Fri, Apr 17 from Orlando Intl. to Lambert-St. Louis Intl., returning Mon, Apr 20, priced at $108 found 3 days ago
Mon, May 11 - Mon, May 18
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$119 Roundtrip, found 5 days ago
$119
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Mon, May 11 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, May 18, priced at $119 found 5 days ago
Thu, Apr 23 - Sat, Apr 25
LGA
LaGuardia
STL
Lambert-St. Louis Intl.
$157 Roundtrip, found 4 days ago
$157
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Apr 23 from LaGuardia to Lambert-St. Louis Intl., returning Sat, Apr 25, priced at $157 found 4 days ago
Thu, Apr 23 - Sat, Apr 25
IAD
Washington Dulles Intl.
STL
Lambert-St. Louis Intl.
$160 Roundtrip, found 2 days ago
$160
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Apr 23 from Washington Dulles Intl. to Lambert-St. Louis Intl., returning Sat, Apr 25, priced at $160 found 2 days ago

Union Flight Information

Traveling To
Union
Destination Airport IATA Code
STL
Number of Airlines Serving
Airlines
Frontier Airlines
Flight Price
$66
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 27 - Mar 30

3 night stay

Orlando (MCO) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $772, price is now $433 per person
$433
per person
found 8 hours ago
21C Museum Hotel St Louis
4.5-star property

21C Museum Hotel St Louis

Apr 1 - Apr 7

6 night stay

Orlando (MCO) to St. Louis (STL)

Frontier Airlines • Roundtrip • Coach
Price was $588, price is now $435 per person
$435
per person
found 5 hours ago
The Cheshire
4.0-star property

The Cheshire

Apr 17 - Apr 20

3 night stay

Philadelphia (PHL) to St. Louis (STL)

Frontier Airlines • Non-stop roundtrip • Coach
Price was $607, price is now $455 per person
$455
per person
found 1 day ago
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Union

Orbitz provides convenient, one-stop shopping for travelers looking for budget flights to Union or any other low fare domestic or international air travel.

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You can find amazing discount fares with Orbitz’s guaranteed low prices or take advantage of last-minute sales and special travel packages. You can also earn points towards your airline frequent flyer programs when you book qualified flights to Union. That means you can rack up money-saving points and miles for future use while saving money now.

We Are Just a Phone Call Away If You Need Us

Booking, changing, or canceling your Union flights is a breeze with Orbitz’s online and mobile tools, but that doesn't mean that we leave you hanging if you want to speak with one of our representatives. If you need help, just contact our Customer Service by email or phone. To enjoy a less stressful trip, be sure to sign up for instant alerts so we can send you any updates or delays relating to your flights to Union to your mobile phone or email.

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 $66 to $160 this week. The most affordable prices for one-way tickets were $28, 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.