A large stone building with columns, a tree in front, and a clear blue sky.

Cheap Flights to Union: Union Flight Deals

View €51 flight on Sat, 19 Sept 2026Opens in a new window

Flight 1

Popular airlines to Union

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 15% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Union

Prices were available within the past 7 days and start at €51 for one-way flights and €102 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
American Airlines
United
Icelandair
Iberia

Find the cheapest month to fly from Columbus (CMH) to St. Louis (STL)

From €130 - €338 per traveller.

Frequently asked questions

What is the name of Union's airport?
Organise a flight to Union and you'll be hitting the runway at Lambert-St. Louis Intl. Airport (STL).
What airport is best to fly into Union?
A flight to Union means coming in to land at Lambert-St. Louis Intl. Airport (STL). Disembark the plane, grab your luggage and you'll be 64 kilometres from the downtown area.
How many airlines fly to Union?
There are 12 airlines connecting Union with 61 airports around the world.
Which airlines fly to Union?
United Airlines and American Airlines are some of the most well-known airlines that offer flights to Union. Travellers often pick Chicago to set off from with United Airlines operating the most flights on this route.
How many nonstop flights are there to Union?
Arranging an unforgettable Union escape is simple when there are 1,206 direct flights each week to choose from.
Where are the most popular flights to Union departing from?
Travellers frequently depart from Chicago, Dallas and New York airports when heading to Union.
How long is the flight to Union Airport?
If it's Chicago you're leaving behind, you'll be in the air for around 1 hour and 22 minutes before you arrive in Union. Tarmac to tarmac from Dallas takes about 1 hour and 43 minutes and from New York, 3 hours and 1 minute.
How to book the cheapest flight to Union?
If you want to save some cash on your trip to Union, listen up! As every experienced jet-setter knows, don't leave booking until the last minute. Airfares are generally more expensive just prior to the departure date. Another terrific way to pick up an unbeatable deal is to research all options. If your destination has several airports, don't forget to look into the cost of flying into a less busy terminal. Finally, be prepared to secure your seat quickly if you find an irresistible price. It might not stick around for long. With a bit of know-how and some luck, the ideal airfare can be yours.
Do you have any tips for my flight to Union?
We've got the lowdown on how to make your flight as pain-free as possible. Follow our tips and you'll be cruising through airport security and having a blast in Union before you know it. What to pack in your hand luggage:
  • Firstly, and most importantly, pack in your passport, important documents, bank cards and medications. Next, you'll want some entertainment to while away the time. A thrilling book and a laptop filled with your favourite shows are some great options. If you hope to catch up on some sleep, a neck pillow and some earplugs will also come in handy. Finally, leave some space for a toothbrush and some deodorant to ensure you hop off the plane looking fresh and ready to go.
Do not pack the following items in your hand luggage:
  • While the list of restricted items can differ between air carriers, the general guide to follow is nothing flammable, sharp or explosive. This includes screwdrivers, pocket knives, spray paint and flares. Sporting equipment like hockey sticks, and items that could injure passengers, such as firearms and swords, won't be allowed on board either.
What to wear on a flight:
  • Comfort should be your priority when deciding what to wear during your flight. Loose clothing is a sensible choice, as are flat, slightly roomy shoes.
  • Deep vein thrombosis (DVT), a blood clotting condition caused by prolonged periods of inactivity, can be a risk on long-haul flights. Make a point of walking around the cabin or do some simple exercises in your seat to improve your circulation.
How to get through airport security fast when flying to Union?
The secret is to be prepared before you get to the airport security gate. That way, you'll be hopping onto that plane to Union in next to no time. Follow these helpful tips and get your trip off to a fantastic start:
  • Have your boarding pass and passport handy. They'll be the first things you'll be asked to present to airport security.
  • The X-ray machine comes next. Remove anything metal on you that is likely to set off the alarm. This includes items like headphones or earphones, as well as your coat or jacket. They'll all need to go on the X-ray conveyor belt.
  • Electronic devices like phones and laptops will also have to go through the machine to be scanned. Don't worry though, you'll be back online in no time.
  • Travelling with your favourite perfume? As long as the volume is no greater than 3.4 ounces (100 millilitres) and it's stored in a clear zip-close bag, you can keep it with you in your carry-on baggage.
  • Lightweight sneakers are a clever footwear choice as you're less likely to be asked to remove them when going through security. Hiking boots and heavier-style shoes are often subjected to additional screening.
  • Airlines will not allow any sharp items or pocket knives in your carry-on luggage. If you need to bring these kinds of items, check them in.

Book with confidence

Expedia.ie is an online travel company that specialises in securing the best prices for flights to Union. With Expedia you get highly specialised services, combining the best of technology, in-depth knowledge and the best connections in order to offer great deals to Union. Expedia shares your passion for travel and has built the best online travel service that promotes and encourages travel. Whether you are looking for cheap flights to Union, or are just on the lookout for the best flights to Union, you are sure to find the best deals with Expedia.ie.

"One of the many benefits of booking your flights through Expedia is that we are one of the world’s largest online travel agency, which means we use our collective experience and work tirelessly to bring you the best prices. With Expedia you get a user-friendly internet experience and a dedicated customer support service that ensures that everything goes smoothly. The goal of Expedia is to offer premium services at the lowest price, all at one single place. If you wish to save even more try combing a hotel in Union to your flight and create a personalised low cost city break or holiday to your favourite destination. Book early and you could save even more!

If you have an Expedia.ie itinerary number and have a question or concern about your travel plans you can call us on (01) 524 5005 from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends and an Expedia agent will help you.

Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
€102

Trending flights to Union

Prices were available within the past 7 days and start at €51 for one-way flights and €102 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
*Available to Expedia members.