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Set your sights on the Gateway to the West with Southwest Airlines®. Whether you’re traveling for business, pleasure, or something in between, Southwest® has a variety of flights from Chicago Midway International Airport to Lambert-St. Louis International Airport. Search for your flight to St. Louis with Southwest and book with confidence. If your upcoming trip can be a little flexible, find flights with our Low Fare Calendar and get the lowest fares available. See all that Southwest Vacations® has to offer for special package deals on flights, hotels, rental cars, and more.
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Departing from: Chicago Midway International Airport (MDW)
Arriving at: Lambert-St. Louis International Airport (STL)
There might be nothing more famous in St. Louis than the arch on the Mississippi. Officially known as the Gateway Arch, it was built in the 1960s and stands at 630 feet tall. The arch helps to honor Lewis and Clark’s 19th-century explorations as well as the expansion to the West. Visit the Museum at the Gateway Arch, a National Park landmark, and learn about the Louisiana Purchase, the Dred Scott case, and more.
You may be coming from the home of deep dish pizza, but did you know that St. Louis is known for its own style of pizza? Its sauce features more oregano than other types of pizza, and the pizza is frequently made with Provel cheese, a type of processed cheese that combines provolone, Swiss, and white cheddar. With a thin, cracker-like crust, Provel cheese, and square slices, you may find yourself flying back to St. Louis more frequently thanks to this unique style of pizza.
After you fill up on pizza, discover Forest Park, a public park in western St. Louis. The park opened in 1876. It is known as the Heart of St. Louis, and with good reason: Forest Park features the St. Louis Zoo, the Saint Louis Art Museum, the Missouri History Museum, and the St. Louis Science Center, among other great landmarks. If your trip allows it, spend a few days exploring the park and all the great amenities it has to offer.
One child over 14 days and under two (2) years of age, not occupying a seat, may be carried free of charge when traveling with an adult (12 years of age or older). Learn more.
Customers flying with a pet are subject to a pet fare. To learn more about traveling with your furry friend, explore the Southwest Pet Policy.
Minors under the age of 18 are not permitted to fly unaccompanied on international flights or any itinerary that includes an international flight. Learn more.
Start packing! Every ticketed Customer’s first two checked bags are free. Learn more.
When you are traveling from Chicago (Midway) to St. Louis, Southwest understands that a great trip means more than just affordable fare between Chicago Midway International Airport and Lambert-St. Louis International Airport. That’s why our variety of services, from booking to boarding, make your travel experience as smooth as possible. Find out more about the Southwest Experience before you book your Chicago (Midway) to St. Louis flight.
It will be a pleasure to fly with Southwest, no matter which of our destinations you choose. And when you search for your next flight to St. Louis, you know you won’t experience hidden fees—we offer low fares and, as always, bags fly free.1 That’s our Transfarency® promise. Enroll in our Click 'N Save® emails and stay in the know about our latest flight deals. Looking for tours, activities, and more great delights? Check out Southwest Airlines® Experiences and earn Rapid Rewards® points when you book.
1First and second checked bags. Weight and size limits apply.
2Fare difference may apply.