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

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Flight deals from Chicago to St Louis

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Find the cheapest month to fly from Chicago to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago to St Louis flights are currently cheapest in September.

Direct flights from Chicago to St Louis

Chicago to St Louis: Alternative routes

Compare routes from Chicago to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Chicago to St Louis: Flight information

The things to know before you go.
Cheapest flight found$116
Cheapest month to flySeptember
Average flight time1 hr, 16 mins
Most popular airlineAmerican Airlines
Average flights per week680

Finding cheap flights from Chicago to St Louis: Frequently asked questions

The best price we found for a round-trip flight from Chicago to St Louis is $116. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 16 minutes is the average flight time from Chicago to St Louis.
American Airlines, Southwest Airlines and United fly direct from Chicago to St Louis.
There are 719 flights per week flying from Chicago to St Louis, as of May 2024.
The cheapest month to fly from Chicago to St Louis is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to St Louis Airport on Friday, September 27, 2024.
Yes – the average flight time is 1 hour and 16 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to St Louis is American Airlines.

New York City and Los Angeles are the only places in America that top Chicago in terms of population size, but there is no denying how much of an economic powerhouse Chi-Town is and has been for nearly two centuries. With 2.7 million people living in the core and 9.5 million in the greater, Chicagoland metropolitan region, Chicago is the undisputed hub of the American Midwest.

Saint Louis is located 262 miles to the Southwest of the city. Since the departure city’s airport is the busiest in the world, expect reasonable delays. All told, standard trip times take about 1 hour between the two cities.

Each area is known for its cultural diversity and aesthetically appealing scenery. St. Louis is much smaller, but boasts more free activities than any other city in the United States, aside from Washington D.C. Alaska Airlines, American Airlines, Continental Airlines, United Airlines, and US Airways offer direct, non-stop flights from Chicago to St. Louis each day.

Leaving O’Hare without a hassle

Chicago O’Hare International finally won over Atlanta’s Hartsfield Airport in terms of passenger traffic and total, annual take-offs and landings last year. After a nine year stretch, the southern-based airfield has given way to the extreme growth and expansion of its Midwestern counterpart!

The size and scope of O’Hare can definitely be intimidating to newcomers, but with its vast expanse comes one of the most efficient and passenger-friendly facilities in the U.S. A crucial flight hub for United Airlines and American Airlines, the airport serves 210 destinations worldwide, and over 25% of these are internationally-based. Chicago’s principal airport has been titled the “Best Airport in North America” ten years running, so that speaks volumes about its amazing features and amenities.

St. Louis: Top travel ideas

The Gateway to the West borders Illinois on the Mississippi River, is primarily served by the manufacturing, trade, and transportation industries, and is home to a number of professional sports team (Cardinals, Blues, and Rams).

By and large a diverse city, visitors will want to pay a trip to the Cathedral Basilica, Missouri Botanical Garden, Forest Park, Gateway Arch (St. Louis’ most famous structure), and Busch Stadium. The historic Tivoli Theater still hosts incredible shows, and meals at Eau Bistro and Café along with Neveria La Vallesana and Bar Italia are bound to make your taste buds happy!

Stop paying an arm and a leg for airfare. Use Skyscanner right now to secure low-cost Chicago to St. Louis flights. Easy and effective, our online compare tool never fails to deliver!


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Prices shown on this page are estimated lowest prices only. Found in the last 45 days.