£529 Cheap Flights to O'Fallon

View £529 flight on Mon, 17 Nov 2025Opens in a new window

Popular airlines to O'Fallon

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 25% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to O'Fallon

Prices were available within the past 7 days and start at £529 for one-way flights and £603 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
Thu, 23 Oct - Wed, 29 Oct
BHX
Birmingham
STL
St. Louis
£603 Return, found 2 hours ago
£603
Return
found 2 hours ago
Select Scandinavian Airlines flight, departing Thu, 23 Oct from Birmingham to St. Louis, returning Wed, 29 Oct, priced at £603 found 2 hours ago
American Airlines
Wed, 8 Oct - Tue, 14 Oct
LGW
London
STL
St. Louis
£637 Return, found 6 hours ago
£637
Return
found 6 hours ago
Select American Airlines flight, departing Wed, 8 Oct from London to St. Louis, returning Tue, 14 Oct, priced at £637 found 6 hours ago
Swiss International Air Lines
Tue, 23 Sept - Wed, 1 Oct
LHR
London
STL
St. Louis
£638 Return, found 4 hours ago
£638
Return
found 4 hours ago
Select Swiss International Air Lines flight, departing Tue, 23 Sept from London to St. Louis, returning Wed, 1 Oct, priced at £638 found 4 hours ago
Lufthansa
Wed, 29 Oct - Tue, 4 Nov
LHR
London
STL
St. Louis
£642 Return, found 1 hour ago
£642
Return
found 1 hour ago
Select Lufthansa flight, departing Wed, 29 Oct from London to St. Louis, returning Tue, 4 Nov, priced at £642 found 1 hour ago
Austrian Airlines
Fri, 21 Nov - Wed, 26 Nov
LHR
London
STL
St. Louis
£644 Return, found 12 hours ago
£644
Return
found 12 hours ago
Select Austrian Airlines flight, departing Fri, 21 Nov from London to St. Louis, returning Wed, 26 Nov, priced at £644 found 12 hours ago

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

August is typically the cheapest month to fly

From £106 - £370 per traveller.

Expedia flights to O'Fallon

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

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 O'Fallon 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 O'Fallon 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 O'Fallon's airport?
Lambert-St. Louis Intl. Airport (STL) is the main airport that serves O'Fallon.
How far is STL from central O'Fallon?
STL is 40 kms (25 miles) from downtown O'Fallon, so expect a bit of a commute into the city.
What airport is best to fly into O'Fallon?
Lambert Field is the main airport in O'Fallon. Before you step on the plane, it's a wise idea to know a thing or two about it. The terminal sits around 40 kms (25 miles) from the downtown area.
How many airlines fly to O'Fallon?
There are 12 air carriers that service O'Fallon from 61 airports across the globe.
Which airlines fly to O'Fallon?
United Airlines and American Airlines frequently fly into O'Fallon. Catching a United Airlines flight from Chicago is one of the most preferred options to get there.
How many nonstop flights are there to O'Fallon?
Planning an amazing O'Fallon escape is easy when there are 1,206 direct flights every week to get you there.
Where are the most popular flights to O'Fallon departing from?
The most popular flights to O'Fallon set off from Chicago, Dallas and New York airports.
How long is the flight to O'Fallon Airport?
If it's Chicago you're departing, you'll be airborne for around 1 hour and 22 minutes before you arrive in O'Fallon. Runway to runway from Dallas takes around 1 hour and 43 minutes and from New York, the flight time is 3 hours and 1 minute.
How to book the cheapest flight to O'Fallon?
Don't leave locking in your flight to O'Fallon until the very last minute. That's one move frequent travellers use to get the best deals. Booking ahead means more options and cheaper flights. Another terrific way to land the best price is to shop around. If where you're headed has several airports, don't forget to research the cost of flying into a less busy terminal. Last of all, another simple way to save a few dollars is be ready to book fast. If you spot a fantastic bargain, don't hold off — snap it up while the opportunity's there.
Do you have any tips for my flight to O'Fallon?
We've pulled together all the info you need to make your flight a stress-free experience. Follow our tips and tricks and you'll be zooming through airport security and discovering O'Fallon in next to no time. What to pack in your hand luggage:

  • It's simple — first, pack in your passport, travel documents, credit cards and vital medications. Next, you'll need some in-flight entertainment to while away the hours. A thrilling novel and a laptop crammed with your favourite shows are good options. If you plan to take a quick snooze, a comfy neck pillow and a pair of earplugs will also be useful. Finally, leave some space for a few toiletry items so you'll step off the plane looking and feeling fresh.

Do not pack the following items in your hand luggage:

  • Check carefully that you don't have a sharp object hiding in the bottom of your hand luggage. Other banned items include flammable or explosive goods, such as aerosol cans and bleach, and liquids and gels in containers larger than 3.4 ounces (100 millilitres).

What to wear on a flight:

  • Your main aim is to be as comfortable as possible. Choose slip-on footwear, dress in loose, breathable clothing and remember to take a sweater in case it gets cold in the cabin.
  • The result of sustained periods of inactivity, deep vein thrombosis (DVT) is a blood clot condition that can affect passengers during long flights. Reduce the risks by staying hydrated, keeping your legs moving and wearing compression tights or socks.

How to get through airport security fast when flying to O'Fallon?
The trick is to be well organised before you arrive at security. That way, you'll be hopping onto that plane to O'Fallon in no time at all. Follow these helpful tips and get your holiday off to a spectacular start:

  • First things first. Your travel ID and boarding pass will need to be inspected by security personnel. Have them close by so you don't hold up the line.
  • The X-ray machine is up next. Remove anything on you that is likely to beep. This includes things like headphones or earphones, as well as your coat or jacket. They'll need to be placed on the conveyor belt for screening.
  • Electronic devices like phones and laptops will also need to go on a tray for inspection. No need to worry though, you'll be back online before you know it.
  • Any gels or liquids, such as perfume or hairspray, that you want to bring on board must be no larger than 3.4 ounces (100 millilitres). Also, everything must fit inside a quart-size (one litre), clear zip-lock bag.
  • It's also likely that you'll need to remove your shoes to be X-rayed, so wearing slip-on sneakers is always a good idea.
  • Airlines will not allow any sharp items or pocket knives to come on board with you. If you need to bring these kinds of items, put them in your checked luggage.

Flights to O'Fallon information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
£603

Trending flights to O'Fallon

Prices were available within the past 7 days and start at £529 for one-way flights and £603 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
Thu, 23 Oct - Wed, 29 Oct
BHX
Birmingham
STL
St. Louis
£603 Return, found 2 hours ago
£603
Return
found 2 hours ago
Select Scandinavian Airlines flight, departing Thu, 23 Oct from Birmingham to St. Louis, returning Wed, 29 Oct, priced at £603 found 2 hours ago
*Available to Expedia members.