Cheap Flights to St Mary: St Mary Flight Deals

View €41 flight on Thu, 14 Aug 2025Opens in a new window

Popular airlines to St Mary

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Cheap round-trip flights to St Mary

Prices were available within the past 7 days and start at €41 for one-way flights and €80 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, 7 Aug - Mon, 11 Aug
ORD
Chicago
STL
St. Louis
€80 Return, found 6 days ago
€80
Return
found 6 days ago
Select American Airlines flight, departing Thu, 7 Aug from Chicago to St. Louis, returning Mon, 11 Aug, priced at €80 found 6 days ago
United
Thu, 7 Aug - Mon, 11 Aug
ORD
Chicago
STL
St. Louis
€120 Return, found 6 days ago
€120
Return
found 6 days ago
Select United flight, departing Thu, 7 Aug from Chicago to St. Louis, returning Mon, 11 Aug, priced at €120 found 6 days ago
Delta
Thu, 14 Aug - Mon, 18 Aug
ORD
Chicago
STL
St. Louis
€154 Return, found 6 days ago
€154
Return
found 6 days ago
Select Delta flight, departing Thu, 14 Aug from Chicago to St. Louis, returning Mon, 18 Aug, priced at €154 found 6 days ago
Southern Airways Express
Thu, 7 Aug - Mon, 11 Aug
ORD
Chicago
STL
St. Louis
€176 Return, found 6 days ago
€176
Return
found 6 days ago
Select Southern Airways Express flight, departing Thu, 7 Aug from Chicago to St. Louis, returning Mon, 11 Aug, priced at €176 found 6 days ago
Scandinavian Airlines
Thu, 23 Oct - Mon, 27 Oct
DUB
Dublin
STL
St. Louis
€527 Return, found 1 day ago
€527
Return
found 1 day ago
Select Scandinavian Airlines flight, departing Thu, 23 Oct from Dublin to St. Louis, returning Mon, 27 Oct, priced at €527 found 1 day ago

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

August is typically the cheapest month to fly

From €153 - €620 per traveller.

Graph displaying average flight prices per month

Expedia.ie is an online travel company that specialises in securing the best prices for flights to St Mary. 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 St Mary. 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 St Mary, or are just on the lookout for the best flights to St Mary, 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 St Mary 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.

Frequently asked questions

What is the name of St Mary's airport?
St Mary is served by just one airport, Lambert-St. Louis Intl. Airport (STL).
How many airlines fly to St Mary?
There are 12 air carriers connecting St Mary to 64 airports globally.
Which airlines fly to St Mary?
United Airlines and American Airlines offer the majority of flights to St Mary. One of the most preferred ways to get there is with a United Airlines flight leaving from Chicago.
How many nonstop flights are there to St Mary?
Arranging an exciting St Mary escape is a cinch when there are 1,319 nonstop flights every week to select from.
Where are the most popular flights to St Mary departing from?
A large number of flights to St Mary leave from Denver, Dallas and Chicago airports.
How long is the flight to St Mary Airport?
If you're going to St Mary from Chicago, you'll have a flight time of 1 hour and 15 minutes. Those departing from Queens Village should expect to be airborne for around 2 hours and 51 minutes. From Denver it's 1 hour and 59 minutes away.
How to book the cheapest flight to St Mary?
We all know those lucky travellers who somehow grab impossibly cheap airfares every time they fly. Would you like to know how to do it for your St Mary holiday? Don't leave it until the last minute to lock in your flight. Don't stop there, however. Do some research and see if there are a few airports at your destination. Prices often differ depending on the airport you pick. Be sure to compare fares across air carriers too. Last but not least, another simple way to save some money is be ready to book fast. If you see a good bargain, don't hold off --- snap it up while you can.
How to survive the flight to St Mary?
We've rounded up all the info you need to make your flight as enjoyable as possible. Follow our tips and you'll be zooming through the airport and enjoying St Mary in no time.What to pack in your hand luggage:
  • The secret to having a worry-free flight experience is to pack ahead. First up, the essentials: passport, official ID, cash and medications. Next, take on board items that'll help keep you busy, like some electronic devices or a juicy novel. You'll also want to pack your chargers, a neck pillow and a pair of earphones. Last but not least, be sure to squeeze in toiletries like a toothbrush, deodorant and a clean set of clothes.

Do not pack the following items in your hand luggage:
  • While the list of prohibited items differs between air carriers, the general rule to follow is nothing sharp, flammable or explosive. This includes screwdrivers, pocket knives, spray paint and flares. Sporting equipment like bows and arrows, and objects that could injure passengers, such as pepper spray and firearms, won't be allowed on board either.

What to wear on a flight:
  • The narrow aisles of your aircraft are no fashion runway. Layer up with comfortable clothing and take a sweater as the temperature can drop inside the cabin during long-haul flights. Enclosed, flat shoes are always a good choice too.
  • A condition known as DVT (deep vein thrombosis) is a risk on long-haul flights. It's the result of blood clots forming due to poor circulation and inactivity. Walking up and down the aisle and doing foot and leg exercises in your seat is a great way to prevent this from happening. Wearing a pair of compression socks also helps reduce your risk.

How to get through airport security fast when flying to St Mary?
The secret is to be well prepared before you reach the airport security gate. That way, you'll be stepping onto that plane to St Mary in the blink of an eye. Follow these helpful tips and get your trip off to a terrific start:
  • Airport security personnel first need to see that you have a valid ID and matching travel documents before you're allowed to proceed any further. Have them close by, ready for inspection.
  • The X-ray machine comes next. Remove anything metal on you that is likely to set off the scanner's alarm. This includes items like earphones or headphones, as well as bulky coats or jackets. They'll all need to go on the X-ray conveyor belt.
  • Electronic devices like laptops and phones will also have to go on a tray for inspection. Don't worry, you'll be back online before you know it.
  • Remove gels and liquids from your carry-on bag. They usually need to be sent through the X-ray machine separately. Each item should be in a container no larger than 3.4 ounces (100 milliliters) and everything must fit in a single quart-size (one litre), clear zip-lock bag.
  • There's a possibility that you'll be asked to take your shoes off for scanning, so wearing lightweight sneakers is always a smart idea.
  • Avoid taking prohibited items in your carry-on bag. If you have any sharp or pointed objects, pack them in your checked luggage. They won't be allowed on board.

Flights to St Mary information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
€79

Trending flights to St Mary

Prices were available within the past 7 days and start at €41 for one-way flights and €80 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Thu, 23 Oct - Mon, 27 Oct
DUB
Dublin
STL
St. Louis
€527 Return, found 1 day ago
€527
Return
found 1 day ago
Select Scandinavian Airlines flight, departing Thu, 23 Oct from Dublin to St. Louis, returning Mon, 27 Oct, priced at €527 found 1 day ago
*Available to Expedia members.