Cheap Flights to Union

View ฿3,150 flight on Sat, 18 Oct 2025Opens in a new window

Popular airlines to Union

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Cheap round-trip flights to Union

Prices were available within the past 7 days and start at ฿3,150 for one-way flights and ฿6,295 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 18 Oct - Sat, 25 Oct
SEA
Seattle
STL
St. Louis
฿6,295 Return, found 1 day ago
฿6,295
Return
found 1 day ago
Select Delta flight, departing Sat, 18 Oct from Seattle to St. Louis, returning Sat, 25 Oct, priced at ฿6,295 found 1 day ago
United
Sat, 18 Oct - Sat, 25 Oct
SEA
Seattle
STL
St. Louis
฿7,585 Return, found 1 day ago
฿7,585
Return
found 1 day ago
Select United flight, departing Sat, 18 Oct from Seattle to St. Louis, returning Sat, 25 Oct, priced at ฿7,585 found 1 day ago
American Airlines
Sat, 18 Oct - Sat, 25 Oct
SEA
Seattle
STL
St. Louis
฿8,685 Return, found 1 day ago
฿8,685
Return
found 1 day ago
Select American Airlines flight, departing Sat, 18 Oct from Seattle to St. Louis, returning Sat, 25 Oct, priced at ฿8,685 found 1 day ago
Philippine Airlines
Thu, 4 Dec - Fri, 9 Jan
BKK
Bangkok
STL
St. Louis
฿32,445 Return, found 6 days ago
฿32,445
Return
found 6 days ago
Select Philippine Airlines flight, departing Thu, 4 Dec from Bangkok to St. Louis, returning Fri, 9 Jan, priced at ฿32,445 found 6 days ago
Korean Air
Mon, 3 Nov - Sun, 16 Nov
BKK
Bangkok
STL
St. Louis
฿36,700 Return, found 23 hours ago
฿36,700
Return
found 23 hours ago
Select Korean Air flight, departing Mon, 3 Nov from Bangkok to St. Louis, returning Sun, 16 Nov, priced at ฿36,700 found 23 hours ago

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

August is typically the cheapest month to fly

From ฿4,572 - ฿15,892 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

Book with confidence

Flights to Union

Searching for cheap flights to Union? No travel company presents more choices than Expedia if you're looking to compare flights to Union. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Union. Expedia provides the cheapest flights to Union and you may find even greater savings if you combine your flight to Union with a hotel stay. Travellers who are flexible about flight times can benefit from last minute cheap flights to Union.

Expedia is the largest online travel agency which means that Expedia have access to cheap airline tickets. So make sure you check Expedia regularly for these bargain flights because the cheapest airline ticket deals sell out fast.

Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Union for that period and let you choose your preferred time and airline.

Travel information

Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
฿6,295

Trending flights to Union

Prices were available within the past 7 days and start at ฿3,150 for one-way flights and ฿6,295 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

Philippine Airlines
Thu, 4 Dec - Fri, 9 Jan
BKK
Bangkok
STL
St. Louis
฿32,445 Return, found 6 days ago
฿32,445
Return
found 6 days ago
Select Philippine Airlines flight, departing Thu, 4 Dec from Bangkok to St. Louis, returning Fri, 9 Jan, priced at ฿32,445 found 6 days ago

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