£725 Cheap Flights to St Mary

View £725 flight on Mon, 12 Jan 2026Opens in a new window

Popular airlines to St Mary

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 25% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to St Mary

Prices were available within the past 7 days and start at £725 for one-way flights and £644 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.

Scandinavian Airlines
Mon, 15 Sep - Mon, 22 Sep
LHR
London
STL
St. Louis
£644 Return, found 6 days ago
£644
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Mon, 15 Sep from London to St. Louis, returning Mon, 22 Sep, priced at £644 found 6 days ago
Austrian Airlines
Fri, 7 Nov - Fri, 14 Nov
LHR
London
STL
St. Louis
£645 Return, found 2 days ago
£645
Return
found 2 days ago
Select Austrian Airlines flight, departing Fri, 7 Nov from London to St. Louis, returning Fri, 14 Nov, priced at £645 found 2 days ago
Lufthansa
Fri, 26 Sep - Sun, 28 Sep
LHR
London
STL
St. Louis
£646 Return, found 6 days ago
£646
Return
found 6 days ago
Select Lufthansa flight, departing Fri, 26 Sep from London to St. Louis, returning Sun, 28 Sep, priced at £646 found 6 days ago
Swiss International Air Lines
Thu, 11 Sep - Mon, 15 Sep
LHR
London
STL
St. Louis
£656 Return, found 2 days ago
£656
Return
found 2 days ago
Select Swiss International Air Lines flight, departing Thu, 11 Sep from London to St. Louis, returning Mon, 15 Sep, priced at £656 found 2 days ago
United
Wed, 10 Dec - Wed, 24 Dec
LHR
London
STL
St. Louis
£660 Return, found 4 days ago
£660
Return
found 4 days ago
Select United flight, departing Wed, 10 Dec from London to St. Louis, returning Wed, 24 Dec, priced at £660 found 4 days ago

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

August is typically the cheapest month to fly

From £129 - £524 per traveller.

Graph displaying average flight prices per month

Expedia flights to St Mary

Searching for cheap flights to St Mary? No travel company presents more choices than Expedia if you're looking to compare flights to St Mary. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Missouri. Expedia provides the cheapest flights to many destinations in Missouri and you may find even greater savings if you combine your flight with a hotel stay in St Mary.

Expedia is the largest online travel agency which means that Expedia have access to cheap flights. So make sure you check Expedia regularly for these bargain flights because the cheapest airline tickets 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 St Mary for that period and let you choose your preferred time and airline. If you need additional assistance, Expedia Customer Service representatives are available from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends. Our capable staff will be able to help you with any questions regarding your St Mary flight, or other booking questions that may arise. When you book flights with Expedia you can rest assured that you have booked the best flight at the lowest price.

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
£643

Trending flights to St Mary

Prices were available within the past 7 days and start at £725 for one-way flights and £644 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.

Scandinavian Airlines
Mon, 15 Sep - Mon, 22 Sep
LHR
London
STL
St. Louis
£644 Return, found 6 days ago
£644
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Mon, 15 Sep from London to St. Louis, returning Mon, 22 Sep, priced at £644 found 6 days ago
*Available to Expedia members.