฿2,575 Cheap Flights from St. Louis (STL) to Chicago (CHI)

View ฿2,575 flight on Mon, 25 Aug 2025Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Chicago

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Cheap Flights from St. Louis (STL) to Chicago (CHI)

Prices were available within the past 7 days and start at ฿2,575 for one-way flights and ฿7,340 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southern Airways Express
Sun, 20 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿7,340 Return, found 16 hours ago
฿7,340
Return
found 16 hours ago
Select Southern Airways Express flight, departing Sun, 20 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿7,340 found 16 hours ago
Southern Airways Express
Mon, 7 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿8,315 Return, found 16 hours ago
฿8,315
Return
found 16 hours ago
Select Southern Airways Express flight, departing Mon, 7 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿8,315 found 16 hours ago
Delta
Sat, 19 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿9,905 Return, found 16 hours ago
฿9,905
Return
found 16 hours ago
Select Delta flight, departing Sat, 19 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿9,905 found 16 hours ago
Delta
Sat, 19 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,090 Return, found 16 hours ago
฿10,090
Return
found 16 hours ago
Select Delta flight, departing Sat, 19 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,090 found 16 hours ago
American Airlines
Sat, 19 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,560 Return, found 16 hours ago
฿10,560
Return
found 16 hours ago
Select American Airlines flight, departing Sat, 19 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,560 found 16 hours ago
United
Sun, 20 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,750 Return, found 16 hours ago
฿10,750
Return
found 16 hours ago
Select United flight, departing Sun, 20 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,750 found 16 hours ago
American Airlines
Sat, 19 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,825 Return, found 16 hours ago
฿10,825
Return
found 16 hours ago
Select American Airlines flight, departing Sat, 19 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,825 found 16 hours ago
American Airlines
Sat, 19 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,880 Return, found 16 hours ago
฿10,880
Return
found 16 hours ago
Select American Airlines flight, departing Sat, 19 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,880 found 16 hours ago
American Airlines
Sat, 19 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,885 Return, found 16 hours ago
฿10,885
Return
found 16 hours ago
Select American Airlines flight, departing Sat, 19 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,885 found 16 hours ago
Southern Airways Express
Mon, 7 Jul - Thu, 24 Jul
STL
St. Louis
ORD
Chicago
฿10,890 Return, found 16 hours ago
฿10,890
Return
found 16 hours ago
Select Southern Airways Express flight, departing Mon, 7 Jul from St. Louis to Chicago, returning Thu, 24 Jul, priced at ฿10,890 found 16 hours ago

Find the cheapest month to fly from St. Louis (STL) to Chicago (CHI)

August is typically the cheapest month to fly

From ฿2,968 - ฿7,639 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Chicago route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
O'Hare Intl.
Return price
฿7,340
Distance
413 km

Perfect flights from St. Louis to Chicago

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from St. Louis to Chicago. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Lambert-St. Louis Intl. to CHI-All Airports ticket options cater to your travel preferences, with incredible one-way fares from ฿2,575 and roundtrip prices from ฿7,340. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at CHI-All Airports and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Chicago.

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to Chicago, IL (CHI-All Airports)?
The lowest price advertised for a round-trip journey from Lambert Field to Chicago, IL (CHI-All Airports) is ฿7,340. But you better act soon. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to Chicago, IL (CHI-All Airports)?
The majority of flights can be cancelled online, but each air carrier has different terms and conditions. If you do have to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from STL to Chicago, IL (CHI-All Airports) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert-St. Louis Intl. Airport (STL) to Chicago, IL (CHI-All Airports) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from STL to Chicago, IL (CHI-All Airports)?
With a flight distance of 400 kilometres, it's only a hop from Lambert Field to Chicago, IL (CHI-All Airports). It might be a quick journey, but it's still worth packing something to keep you entertained on board.
Which airlines fly direct from Lambert Field to Chicago, IL (CHI-All Airports)?
Southwest Airlines (WN) is one of the top choices for travellers jetting between STL and Chicago, IL (CHI-All Airports). Choose from the 208 flights it offers on this route each month. United Airlines (UA) is another popular choice. It operates 208 flights per month. Between these two airlines, you'll be able to find a good deal from St. Louis to Illinois.
Are STL to Chicago, IL (CHI-All Airports) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can occasionally score a bargain, with some super cheap fares from Lambert Field to Chicago, IL (CHI-All Airports) popping up a few weeks prior to the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals frequently --- as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines advertise prices so far in advance.

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