£33 Cheap Flights from St. Louis (STL) to Chicago (CHI)

View £33 flight on Wed, 30 Jul 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 £33 for one-way flights and £147 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southern Airways Express
Wed, 24 Dec - Thu, 1 Jan
STL
St. Louis
ORD
Chicago
£147 Return, found 1 day ago
£147
Return
found 1 day ago
Select Southern Airways Express flight, departing Wed, 24 Dec from St. Louis to Chicago, returning Thu, 1 Jan, priced at £147 found 1 day ago
Southern Airways Express
Mon, 11 Aug - Mon, 18 Aug
STL
St. Louis
ORD
Chicago
£148 Return, found 10 hours ago
£148
Return
found 10 hours ago
Select Southern Airways Express flight, departing Mon, 11 Aug from St. Louis to Chicago, returning Mon, 18 Aug, priced at £148 found 10 hours ago
Southern Airways Express
Fri, 10 Oct - Sun, 19 Oct
STL
St. Louis
ORD
Chicago
£155 Return, found 3 days ago
£155
Return
found 3 days ago
Select Southern Airways Express flight, departing Fri, 10 Oct from St. Louis to Chicago, returning Sun, 19 Oct, priced at £155 found 3 days ago
Southern Airways Express
Mon, 14 Jul - Mon, 21 Jul
STL
St. Louis
ORD
Chicago
£156 Return, found 6 days ago
£156
Return
found 6 days ago
Select Southern Airways Express flight, departing Mon, 14 Jul from St. Louis to Chicago, returning Mon, 21 Jul, priced at £156 found 6 days ago
Southern Airways Express
Mon, 14 Jul - Fri, 18 Jul
STL
St. Louis
ORD
Chicago
£163 Return, found 6 days ago
£163
Return
found 6 days ago
Select Southern Airways Express flight, departing Mon, 14 Jul from St. Louis to Chicago, returning Fri, 18 Jul, priced at £163 found 6 days ago
Southern Airways Express
Fri, 18 Jul - Tue, 22 Jul
STL
St. Louis
ORD
Chicago
£164 Return, found 2 days ago
£164
Return
found 2 days ago
Select Southern Airways Express flight, departing Fri, 18 Jul from St. Louis to Chicago, returning Tue, 22 Jul, priced at £164 found 2 days ago
Southern Airways Express
Mon, 14 Jul - Mon, 21 Jul
STL
St. Louis
ORD
Chicago
£171 Return, found 6 days ago
£171
Return
found 6 days ago
Select Southern Airways Express flight, departing Mon, 14 Jul from St. Louis to Chicago, returning Mon, 21 Jul, priced at £171 found 6 days ago
Southern Airways Express
Fri, 11 Jul - Sun, 13 Jul
STL
St. Louis
ORD
Chicago
£178 Return, found 2 days ago
£178
Return
found 2 days ago
Select Southern Airways Express flight, departing Fri, 11 Jul from St. Louis to Chicago, returning Sun, 13 Jul, priced at £178 found 2 days ago
Southern Airways Express
Sun, 13 Jul - Sun, 20 Jul
STL
St. Louis
ORD
Chicago
£206 Return, found 6 days ago
£206
Return
found 6 days ago
Select Southern Airways Express flight, departing Sun, 13 Jul from St. Louis to Chicago, returning Sun, 20 Jul, priced at £206 found 6 days ago
Alaska Airlines
Wed, 13 Aug - Wed, 20 Aug
STL
St. Louis
ORD
Chicago
£297 Return, found 10 hours ago
£297
Return
found 10 hours ago
Select Alaska Airlines flight, departing Wed, 13 Aug from St. Louis to Chicago, returning Wed, 20 Aug, priced at £297 found 10 hours ago

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

August is typically the cheapest month to fly

From £67 - £171 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
£146
Distance
413 km

Compare flights from St. Louis to Chicago easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to Chicago. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to CHI-All Airports in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to CHI-All Airports.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to CHI-All Airports (CHI)

The easiest way to view the best deals on flights from St. Louis to Chicago today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to CHI-All Airports start at just £147 and range up to £297.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near St. Louis and Chicago
  • booking your flight during December, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your St. Louis to Chicago flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to CHI-All Airports for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

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 £147. 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.

Explore a world of travel with Expedia

Chicago Airports

Chicago

St. Louis to O'Hare Intl.
£146.50
*Available to Expedia members.