Cheap flights To Union (STL) from $28

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Cheap Flights to Union from $28 One Way, $56 Round Trip

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

Sat, May 2 - Sat, May 9
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$56 Roundtrip, found 23 hours ago
$56
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Sat, May 2 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, May 9, priced at $56 found 23 hours ago
Sat, Feb 28 - Wed, Mar 4
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$58 Roundtrip, found 1 day ago
$58
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Feb 28 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Mar 4, priced at $58 found 1 day ago
Sat, Apr 18 - Sat, Apr 18
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$61 Roundtrip, found 2 days ago
$61
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Apr 18 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Apr 18, priced at $61 found 2 days ago
Thu, Mar 26 - Tue, Mar 31
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 Thu, Mar 26 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Tue, Mar 31, priced at $64 found 1 day ago
Wed, Mar 18 - Wed, Mar 18
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$66 Roundtrip, found 22 hours ago
$66
Roundtrip
found 22 hours ago
Select Frontier Airlines flight, departing Wed, Mar 18 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Mar 18, priced at $66 found 22 hours ago
Wed, Mar 11 - Wed, Mar 18
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$92 Roundtrip, found 2 days ago
$92
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Mar 11 from Orlando Intl. to Lambert-St. Louis Intl., returning Wed, Mar 18, priced at $92 found 2 days ago
Mon, Mar 2 - Mon, Mar 2
PHX
Sky Harbor Intl.
STL
Lambert-St. Louis Intl.
$118 Roundtrip, found 3 days ago
$118
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Mar 2 from Sky Harbor Intl. to Lambert-St. Louis Intl., returning Mon, Mar 2, priced at $118 found 3 days ago
Mon, May 11 - Mon, May 18
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$119 Roundtrip, found 8 hours ago
$119
Roundtrip
found 8 hours 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 8 hours ago
Mon, Mar 2 - Tue, Mar 3
JFK
John F. Kennedy Intl.
STL
Lambert-St. Louis Intl.
$152 Roundtrip, found 3 days ago
$152
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Mar 2 from John F. Kennedy Intl. to Lambert-St. Louis Intl., returning Tue, Mar 3, priced at $152 found 3 days ago
Thu, Apr 23 - Thu, Apr 30
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$160 Roundtrip, found 8 hours ago
$160
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Apr 23 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Thu, Apr 30, priced at $160 found 8 hours ago

Union Flight Information

Traveling To
Union
Destination Airport IATA Code
STL
Number of Airlines Serving
Airlines
Frontier Airlines, American Airlines
Flight Price
$56
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.
OYO Travelier Motel
2.5-star property

OYO Travelier Motel

Apr 1 - Apr 5

4 night stay

New York (NYC) to St. Louis (STL)

American Airlines • Roundtrip • Coach
Price was $474, price is now $402 per person
$402
per person
found 1 day ago
The Wildwood Hotel
3.5-star property

The Wildwood Hotel

Mar 22 - Mar 25

3 night stay

Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

United • Coach

St. Louis (STL) to Newark Liberty Intl. Airport (EWR)

American Airlines • Coach
Price was $771, price is now $591 per person
$591
per person
found 6 hours ago
Landing Apartments - Eureka
4.0-star property

Landing Apartments - Eureka

Mar 22 - Mar 25

3 night stay

Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

United • Coach

St. Louis (STL) to Newark Liberty Intl. Airport (EWR)

American Airlines • Coach
Price was $1,017, price is now $868 per person
$868
per person
found 6 hours ago
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See all available trips from New York to Union
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Union first class flight packages

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

The Wildwood Hotel

9.2/10 Wonderful! (1,600 reviews)

Mar 17 - Mar 23

6 night stay

Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

United • Roundtrip • FirstClass
Price was $1,342, price is now $864 per person
$864
per person
found 1 day ago
This hotel was fantastic! Check in was easy with friendly staff, the room was beautiful and well appointed. Breakfast was advertised as a Continental, however they had hot options as well, which was great. Every staff member we saw in the hotel said hi and was friendly. I would definitely stay here again!

Reviewed on Oct 16, 2025

The Cheshire
4.0-star property

The Cheshire

8.6/10 Excellent! (1,002 reviews)

Mar 17 - Mar 23

6 night stay

Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

United • Roundtrip • FirstClass
Price was $1,379, price is now $1,076 per person
$1,076
per person
found 1 day ago
We always stay here when in St. Louis. Love the place. Nice atmosphere, great pub.

Reviewed on Sep 2, 2025

Hotel Indigo St Louis - Central West End by IHG
3.5-star property

Hotel Indigo St Louis - Central West End by IHG

8.2/10 Very Good! (1,000 reviews)

Mar 17 - Mar 23

6 night stay

Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

United • Roundtrip • FirstClass
Price was $1,155, price is now $909 per person
$909
per person
found 1 day ago
The construction is coming along and soon this will be an amazing property again. But it was great for my stay.

Reviewed on Jul 2, 2025

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See all available trips from Newark Liberty Intl. Airport to Union
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Union

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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 $56 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.