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Cheap Flights to O'Fallon , IL from CA $216

View CA $216 flight on Sat, Sep 5, 2026Opens in a new window

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How much is the cheapest flight to O'Fallon?

Prices were available within the past 7 days and start at CA $216 for one-way flights and CA $390 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
American Airlines
United
Air Canada
Alaska Airlines

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

From CA $255 - CA $1,105 per traveller.

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 kilometres 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 kilometres 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 organized 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 vacation 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.

Book with confidence

Expedia.ca gives you the best tools to secure great deals on flights to O'Fallon. Use our easy and convenient booking engine to browse nonstop flights and convenient departure points every day of the year. Search airfares from the top airlines to book your perfect flight to O'Fallon. Whatever your travel needs, you can always rely on Expedia.ca to help you find cheap flights to O'Fallon.

Using our booking engine is simple - just type in your points of travel and preferred dates and Expedia.ca does the rest! If your travel times are flexible, you can find even better bargains by adjusting your flight dates. Browse connecting flights to increase your chances of finding even lower fares. Thanks to Expedia's Best Price Guarantee, you can book your O'Fallon flights with full confidence knowing that you've found the best deal online.

Expedia.ca makes the booking process easy and stress-free by offering support along the entire way. Our friendly staff is available 24 hours a day to provide assistance and help you book your ticket. Call us toll-free at 1-888-397-3342 to answer any questions that you may have about your trip to O'Fallon.

Looking to save even more? Get additional savings by bundling your O'Fallon flight with a hotel and/or car rental to create a bargain travel package. Early birds can discover terrific savings by booking in advance while last minute travelers can enjoy great last minute deals. With Expedia.ca, there's no shortage of options to save even more on your O'Fallon trip!

Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Roundtrip price
CA $389

Trending flights to O'Fallon

Prices were available within the past 7 days and start at CA $216 for one-way flights and CA $390 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
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