STL - CHI

$59 Find Cheap Flights from St. Louis to Chicago - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Chicago departing on 7/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$195
Typical prices: $211-$361
American Airlines
Sat 8/8Mon 8/10
STL - ORD • Non-stop
Cheapest one-way
$59
Typical prices: $118-$203
Southwest
Wed 7/22
STL - MDW • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Lufthansa Economy Light suits short trips; Qatar Economy adds a free checked bag.
American Basic Economy fits fixed plans; Southwest offers flexible cancellation policy.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $195 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with American Airlines, Southwest and United Airlines. Average duration is 1h 23m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top routes
Cheapest • 21% average savings
Most popular
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $80 (round-trip)
Shortest trip • 3h 28m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 47% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 33% price drop
Most popular
Good to know
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Chicago

Sat, Aug 8 - Mon, Aug 10
American Airlines Logo
5:00 am - 6:24 am
STL
-
ORD
1h 24mnonstop
American Airlines Logo
7:00 am - 8:24 am
ORD
-
STL
1h 24mnonstop
$195American Airlines
Tue, Aug 4 - Tue, Aug 11
Delta Logo
10:33 am - 4:17 pm
STL
-
ORD
5h 44m
1 stop
Delta Logo
8:48 am - 1:14 pm
ORD
-
STL
4h 26m
1 stop
$208Delta
Tue, Aug 4 - Sat, Aug 8
Delta Logo
6:30 am - 10:42 am
STL
-
ORD
4h 12m
1 stop
Delta Logo
2:30 pm - 8:42 pm
ORD
-
STL
6h 12m
1 stop
$218Delta
Sat, Aug 8 - Mon, Aug 10
Frontier Logo
4:57 pm - 8:02 am
STL
-
ORD
15h 05m
1 stop
Frontier Logo
1:50 pm - 5:37 pm
ORD
-
STL
27h 47m
1 stop
$219Frontier
Wed, Jul 29 - Wed, Aug 5
Frontier Logo
4:09 pm - 11:10 pm
STL
-
ORD
7h 01m
1 stop
Frontier Logo
7:29 am - 6:05 pm
ORD
-
STL
10h 36m
1 stop
$220Frontier
Mon, Aug 3 - Tue, Aug 11
Frontier Logo
4:57 pm - 7:53 am
STL
-
ORD
14h 56m
1 stop
Frontier Logo
9:57 pm - 7:23 pm
ORD
-
STL
21h 26m
1 stop
$224Frontier
Sat, Aug 1 - Tue, Sep 1
Frontier Logo
4:09 pm - 11:10 pm
STL
-
ORD
7h 01m
1 stop
Frontier Logo
9:20 am - 4:31 pm
ORD
-
STL
7h 11m
1 stop
$225Frontier
Tue, Jul 28 - Fri, Jul 31
Southwest Logo
5:40 am - 6:45 am
STL
-
MDW
1h 05mnonstop
Southwest Logo
9:35 pm - 10:55 pm
MDW
-
STL
1h 20mnonstop
$227Southwest
Mon, Aug 3 - Tue, Aug 11
United Airlines Logo
10:20 am - 11:52 am
STL
-
ORD
1h 32mnonstop
United Airlines Logo
8:29 pm - 10:00 pm
ORD
-
STL
1h 31mnonstop
$227United Airlines
Tue, Jul 28 - Fri, Jul 31
Southwest Logo
5:55 pm - 7:05 pm
STL
-
MDW
1h 10mnonstop
Southwest Logo
3:30 pm - 7:10 pm
MDW
-
STL
3h 40m
1 stop
$237Southwest
Booking Insights

KAYAK's insights & trends for St. Louis to Chicago flights

Get data-powered insights and trends into flights from St. Louis to Chicago to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Chicago?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Chicago departing in August.

What is the cheapest St. Louis to Chicago flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from St. Louis to Chicago costs $197 on the route between St. Louis (STL) and Chicago Midway Airport (MDW). Over the past month, this route was, on average, 21% cheaper than other St. Louis-Chicago routes. The most popular route is between St. Louis (STL) and Chicago O'Hare Intl Airport (ORD).

What’s the cheapest day of the week to fly from St. Louis to Chicago?

The average price of all round-trip flights from St. Louis to Chicago clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Chicago on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from St. Louis to Chicago. For your return ticket, we recommend flying on a Saturday and avoiding Mondays for the best deals.

What is the cheapest month to fly from St. Louis to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Chicago, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Chicago is August, where tickets cost $61 (return) on average. On the other hand, the most expensive months are February and June, where the average cost of round-trip tickets is $117 and $117 respectively.

Can I save money by flying with a layover from St. Louis to Chicago?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $224 on average.

How far in advance should I book a flight from St. Louis to Chicago?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Chicago, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Chicago, you should book around 5 weeks before departure, which saves you about 47% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to Chicago

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Qatar Airways, United Airlines, ORD and MDW

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low seasonJanuary
Cheapest flight$59
Best time to beat the crowds but there is an average 48% increase in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from St. Louis to Chicago Midway Airport

When to book flights from St. Louis to Chicago

Are your dates flexible? Find out the best times to travel from St. Louis to Chicago based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Chicago

  • What parking services does St. Louis Lambert International Airport provide?

    The airport provides various convenient parking facilities depending on the length of the passenger’s stay. You can choose between short-term parking and long-term parking, with the long-term parking lots being located a few minutes away from the terminal. The airport provides free shuttle services from the long-term parking lots throughout the day. Passengers can check parking availability online before getting to the airport.

  • What accessibility services does St. Louis Lambert International Airport provide?

    All the airport’s terminals and concourses are easily wheelchair accessible using automatic doors, as well as providing accessible restrooms for individuals with mobility impairments. All elevators within the airport are also fitted with raised numbers and Braille signage and all parking garages and terminals offer audible information. Persons with disabilities are also provided with designated parking spots and specially designed security checkpoint lanes.

  • How do I get from the airport in Chicago to downtown Chicago?

    You can use either public transit or private means to get from either of the two airports in Chicago to downtown. The L train serves both O’Hare International Airport and Midway International Airport, and passengers can use it to get downtown at any time. Payment for the L Train can be done via contactless payment or using a Ventra Ticket or Ventra Card. Alternatively, you can take a taxi, use rideshare services, or rent a car at any of the car rental services with operations at Chicago’s airports.

  • Can I travel through St. Louis Lambert International Airport with my pet?

    St. Louis Lambert International Airport is a pet-friendly environment that offers six pet relief areas for traveling pets and service animals. The wheelchair-accessible indoor pet relief areas are located in Terminal 2, Concourse A, and Concourse C. Each of the indoor pet relief areas has an artificial grassy area with a hose that facilitates easy liquid waste cleanup. The outdoor pet relief areas are located outside Terminal 1 and Terminal 2.

  • What is the cheapest flight from St. Louis to Chicago?

    In the last 5 days, the lowest price for a flight from St. Louis to Chicago was $59 for a one-way ticket and $195 for a round-trip.

  • Do I need a passport to fly between St. Louis and Chicago?

    A passport is not required to fly from St. Louis to Chicago.

  • Which airports will I be using when flying from St. Louis to Chicago?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at one of these airports: Chicago Midway or Chicago O'Hare Intl.

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Chicago?

    American Airlines, and Delta offer inflight Wi-Fi service on the St. Louis to Chicago flight route.

  • Which aircraft models fly most regularly from St. Louis to Chicago?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the St. Louis to Chicago flight route.

  • Which airline alliances offer flights from St. Louis to Chicago?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Chicago, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to Chicago?

    There are nonstop flights from St. Louis to Chicago on a daily basis.

  • Which is the best airline for flights from St. Louis to Chicago, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Chicago are Southwest and United Airlines. With an average price for the route of $333 and an overall rating of 7.9, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $338 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Chicago?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Chicago.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Chicago?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Chicago?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Chicago?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to Chicago

  • Looking for a cheap flight? 25% of our users found flights on this route for $237 or less one-way and $428 or less round-trip.
  • When departing from St. Louis Lambert International Airport (STL), it is recommended that you arrive 2h before the time of departure for both domestic and international flights.
  • When flying into Chicago and you would want to avoid crowds, choose to fly into Midway International Airport (MDW) as opposed to O’Hare International Airport (ORD) as the airport receives significantly less traffic.
  • Have no worries when traveling from St. Louis Lambert International Airport if you have breastfeeding children. The airport provides lactation suites that are well equipped with a chair, power outlets, and a sink. These lactation suites are located on all concourses at the airport, close to Gates E33, C9, and A10.
  • Enjoy several lounge options at St. Louis Lambert International Airport where you can relax or work before the departure of your flight. The lounges are located in Terminal 1, both inside and outside security, as well as in Terminal 2 inside security.
  • If your flight into Chicago arrives late and you will be in need of accommodation services, consider flying to O’Hare International Airport. The Hilton Chicago O’Hare Airport Hotel is conveniently located within the airport, right across the terminals.

Prefer to fly direct from St. Louis to Chicago?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Chicago.
Find which airlines fly direct from Lambert-St Louis Airport to Chicago, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Chicago

Monday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Tuesday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Wednesday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Thursday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Friday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Saturday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Sunday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

See more direct flights

Direct returns

Chicago to Lambert-St Louis

Monday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Tuesday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Wednesday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Thursday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Friday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Saturday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

Sunday

American Airlines,Southwest,United Airlines

American Airlines,Southwest, +1 more

See more direct flights

Reviews of the top 3 airlines serving from St. Louis to Chicago

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Chicago? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4250 reviews
8.0Comfort
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
Airline reviews

Snacks are always pretzels. Why can't you also offer peanuts ?

6.0 GoodAnonymous, Mar 2026
STL - HOU
Read more Southwest reviews

Snacks are always pretzels. Why can't you also offer peanuts ?

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Very good. Sad to learn Southwest is going start to charge for bags

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.

Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.

Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!

Everything went smoothly and the plane wasn’t full. It was delayed though. The delay was increased due to a crew change which was frustrating.

Love Southwest! Always a good trip with a happy crew who goes out of their way to be kind and fun.

friendly staff for the most part. they thought we were going to have bad turbulence so no drink service. there wasn't any turbulence. Iwish you had a choice of snacks

1 flight cancelled Had to fly out of different city Flight at new departure city was delayed 3 hours causing us to miss connecting flights. By the time we did make it to Prague our luggage did not. Had to wait day and a half for luggage to be delivered. Customer service was not good. Agents did not arrive at gate until 5-10 minutes before boarding

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

We were told our seats were switched which put us in row 1 instead of 12. We were not able to keep our personal items with us. This caused us not to be able to have our gum to pop our ears and we weren’t able to get our iPads out due to the seat belt sign never turning off.

Boarding was quick and efficient. My screen didn’t come on and everyone else had theirs working so a little bummer but it was a short flight!

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

The wifi experience is awful. I had to try again and again, taking over 30 minutes, to connect to the wifi. I had to watch the same two ads over and over until I was finally successful. Once connected, it was anything but "high speed" and disconnected at least three times during the flight.

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

The CX617 from HK to BKK was delayed more than 1.5 hours.

Everything you need to know for your flight from St. Louis to Chicago

Information on your arrival and departure airports

Compare transportation modes for St. Louis to Chicago

Transportation modeAverage priceAverage duration
Flights$1,2551h 05m
Trains$845h 10m
Buses$896h 05m