Cheap Flights to Union from HK$1,861

View HK$1,861 flight on Tue, 9 Sep 2025Opens in a new window

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Cheap round-trip flights to Union

Prices were available within the past 7 days and start at HK$1,861 for one-way flights and HK$7,561 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Sun, 7 Sep - Wed, 10 Sep
HKG
Hong Kong SAR
STL
St. Louis
HK$7,561 Return, found 5 days ago
HK$7,561
Return
found 5 days ago
Select EVA Airways flight, departing Sun, 7 Sep from Hong Kong SAR to St. Louis, returning Wed, 10 Sep, priced at HK$7,561 found 5 days ago
Delta
Sat, 12 Jul - Mon, 21 Jul
ANC
Anchorage
STL
St. Louis
HK$7,822 Return, found 23 hours ago
HK$7,822
Return
found 23 hours ago
Select Delta flight, departing Sat, 12 Jul from Anchorage to St. Louis, returning Mon, 21 Jul, priced at HK$7,822 found 23 hours ago
United
Sat, 12 Jul - Mon, 21 Jul
ANC
Anchorage
STL
St. Louis
HK$8,450 Return, found 23 hours ago
HK$8,450
Return
found 23 hours ago
Select United flight, departing Sat, 12 Jul from Anchorage to St. Louis, returning Mon, 21 Jul, priced at HK$8,450 found 23 hours ago
American Airlines
Sat, 12 Jul - Mon, 21 Jul
ANC
Anchorage
STL
St. Louis
HK$8,604 Return, found 23 hours ago
HK$8,604
Return
found 23 hours ago
Select American Airlines flight, departing Sat, 12 Jul from Anchorage to St. Louis, returning Mon, 21 Jul, priced at HK$8,604 found 23 hours ago
Cathay Pacific
Mon, 1 Sep - Mon, 8 Sep
HKG
Hong Kong SAR
STL
St. Louis
HK$11,763 Return, found 4 hours ago
HK$11,763
Return
found 4 hours ago
Select Cathay Pacific flight, departing Mon, 1 Sep from Hong Kong SAR to St. Louis, returning Mon, 8 Sep, priced at HK$11,763 found 4 hours ago

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

August is typically the cheapest month to fly

From HK$1,232 - HK$5,452 per traveller.

Graph displaying average flight prices per month

Frequently asked questions

What is the name of Union's airport?
If you're traveling by plane, you won't have to worry which airport to fly into. Union has just one -- Lambert-St. Louis Intl. Airport (STL).
What airport is best to fly into Union?
Travelers from all around the world go through Lambert-St. Louis Intl. Airport (STL) each day. Step off the plane, collect your luggage and you'll be 64 kilometres from the center of Union.
How many airlines fly to Union?
There are a total of 12 airlines connecting Union with 64 airports globally.
Which airlines fly to Union?
United Airlines and American Airlines frequently fly to Union. Hopping on a United Airlines flight from Chicago is one of the most popular ways to get there.
How many nonstop flights are there to Union?
Planning an awesome Union escape is easy when there are 1,319 nonstop flights every week to choose from.
Where are the most popular flights to Union departing from?
The most popular flights to Union take off from Denver, Dallas and Chicago airports.
How long is the flight to Union Airport?
Which airport you depart from determines how much of the in-flight entertainment you'll get to see. From Chicago to Union, the average flight time is 1 hour and 15 minutes. From Queens Village it's more like 2 hours and 51 minutes, and from Denver it's 1 hour and 59 minutes.
How to book the cheapest flight to Union?
If you want to save some cash on your Union vacation, listen up! As every experienced traveler knows, don't book at the very last minute. Fares are generally more expensive just prior to the departure date. Another terrific way to land the most affordable fare is to research all options. If your destination has several airports, be sure to research the cost of flying into a less busy terminal. Lastly, be ready to book quickly if you find a great price. It might not be available for long! With a bit of know-how and some good fortune, the perfect airfare will be yours.
How to survive the flight to Union?
We've pulled together all the info you need to make your journey as pain-free as possible. Follow our tips and tricks and you'll be zooming through airport security and seeing the best of Union before you know it.What to pack in your hand luggage:

  • First and foremost, pack in your passport, travel documents, wallet and daily medications. Next, you'll need some extra in-flight entertainment to help pass the time. A juicy book and a tablet filled with your favorite shows are some wonderful options. If you plan to take a short nap, a neck pillow and a pair of earplugs will also be useful. Finally, make room for a toothbrush and some deodorant to ensure you touchdown looking fresh and raring to go.

Do not pack the following items in your hand luggage:

  • Double-check that you don't have a pocket knife lurking in one of the compartments of your hand luggage. Other banned items include flammable or explosive substances, such as aerosol cans and bleach, and liquids and gels in containers larger than 3.4 ounces (100 milliliters).

What to wear on a flight:

  • The narrow aisles of an airplane are no fashion runway. Layer yourself up with comfortable clothes and pack a cardigan as it can get chilly in the cabin. Slightly roomy, flat shoes are always a good choice too.
  • Unfortunately, a risk of long-distance flying is developing deep vein thrombosis (DVT), a blood clotting condition caused by prolonged inactivity. To prevent this from happening, take every opportunity to wander around the cabin. Compression socks and tights are another easy way to help reduce this risk.

How to get through airport security fast when flying to Union?
Being prepared before you get to the airport can make your getaway to Union a breeze. Here are some top tips for a speedy journey past security:

  • Airport security personnel first need to know that you have a valid ID and matching travel documents before you can proceed any further. Have them in your hand, ready for inspection.
  • Next up, both you and your carry-on luggage must be X-rayed. To speed things up, remove anything that might trigger the alarms. Personal belongings like your jacket, belt and headphones will be required to go through the machine.
  • For just a few moments, you'll need to unplug from the digital world. Your laptop, phone and any other electronic devices also need to go through the scanner.
  • Traveling with your favorite cologne or perfume? Not a problem. As long as it's in a container no larger than 3.4 ounces (100 milliliters) and it's stored in a clear zip-close bag, it's OK to bring with you in your carry-on.
  • It's also likely that you'll be asked to take your shoes off to be X-rayed, so wearing lightweight sneakers is always a good idea.
  • Airlines won't allow any sharp items or pocket knives to come on board with you. If you need to bring these kinds of items, pack them safely in your checked luggage.

Flights to Union information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
HK$7,561
*Available to Expedia members.