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Cheap flights from St. Louis to Chicago from $72

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Chicago departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Chicago

Cheap round-trip flights

Frontier Logo
4:00 pm - 11:20 pmSTL-MDW
7h 20m1 stop
Frontier Logo
6:20 am - 3:04 pmMDW-STL
8h 44m1 stop
$143Frontier
Find Deal
Mon, Sep 8 - Thu, Sep 11
Frontier Logo
4:00 pm - 11:20 pmSTL-MDW
7h 20m1 stop
Frontier Logo
6:20 am - 3:04 pmMDW-STL
8h 44m1 stop
$144Frontier
Find Deal
Thu, Sep 11 - Thu, Sep 18
Frontier Logo
4:00 pm - 11:20 pmSTL-MDW
7h 20m1 stop
Frontier Logo
4:48 pm - 9:06 amMDW-STL
16h 18m1 stop
$151Frontier
Find Deal
Mon, Sep 8 - Fri, Sep 12
Frontier Logo
11:11 am - 4:57 pmSTL-MDW
5h 46m1 stop
Frontier Logo
6:24 pm - 9:07 amMDW-STL
14h 43m1 stop
$157Frontier
Find Deal
Fri, Oct 24 - Sun, Oct 26
Frontier Logo
6:05 pm - 10:21 amSTL-MDW
16h 16m1 stop
Frontier Logo
6:24 pm - 9:07 amMDW-STL
14h 43m1 stop
$163Frontier
Find Deal
Fri, Oct 17 - Mon, Oct 20
Southwest Logo
6:30 pm - 7:40 pmSTL-MDW
1h 10mnonstop
Southwest Logo
5:45 am - 6:55 amMDW-STL
1h 10mnonstop
$227Southwest
Find Deal
Mon, Oct 13 - Tue, Oct 14
Southwest Logo
7:20 am - 8:30 amSTL-MDW
1h 10mnonstop
Southwest Logo
7:30 am - 8:40 amMDW-STL
1h 10mnonstop
$237Southwest
Find Deal
Mon, Sep 22 - Mon, Sep 29
Delta Logo
6:00 am - 12:28 pmSTL-MDW
6h 28m2 stops
Delta Logo
10:35 am - 2:43 pmMDW-STL
4h 08m1 stop
$242Delta
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Tue, Oct 7 - Wed, Oct 8
Delta Logo
6:00 am - 12:28 pmSTL-MDW
6h 28m2 stops
Delta Logo
6:00 am - 12:21 pmMDW-STL
6h 21m1 stop
$252Delta
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Sat, Sep 13 - Tue, Sep 16
Logo
4:00 pm - 11:20 pmSTL-MDW
7h 20m1 stop
Logo
7:03 pm - 9:06 amMDW-STL
14h 03m2 stops
$273
Find Deal
Mon, Sep 22 - Mon, Sep 29

Southwest flights from St. Louis to Chicago Midway Airport

Our best Southwest deals on St. Louis to Chicago Midway Airport flight tickets
Southwest
Oct 13
STL6:30 pmLambert-St Louis
1h 10m
MDW7:40 pmChicago Midway
Oct 14
MDW5:45 amChicago Midway
1h 10m
STL6:55 amLambert-St Louis
$227
Find similar
Southwest
Sep 22
STL7:20 amLambert-St Louis
1h 10m
MDW8:30 amChicago Midway
Sep 29
MDW7:30 amChicago Midway
1h 10m
STL8:40 amLambert-St Louis
$237
Find similar
Southwest
Sep 18
STL7:20 pmLambert-St Louis
1h 05m
MDW8:25 pmChicago Midway
Sep 23
MDW8:30 amChicago Midway
5h 10m
1 stop
STL1:40 pmLambert-St Louis
$247
Find similar

Frontier flights from St. Louis to Chicago Midway Airport

Our best Frontier deals on St. Louis to Chicago Midway Airport flight tickets
Frontier
Sep 8
STL4:00 pmLambert-St Louis
7h 20m
1 stop
MDW11:20 pmChicago Midway
Sep 11
MDW6:20 amChicago Midway
8h 44m
1 stop
STL3:04 pmLambert-St Louis
$143
Find similar
Frontier
Sep 11
STL4:00 pmLambert-St Louis
7h 20m
1 stop
MDW11:20 pmChicago Midway
Sep 18
MDW6:20 amChicago Midway
8h 44m
1 stop
STL3:04 pmLambert-St Louis
$144
Find similar
Frontier
Sep 8
STL4:00 pmLambert-St Louis
7h 20m
1 stop
MDW11:20 pmChicago Midway
Sep 12
MDW4:48 pmChicago Midway
16h 18m
1 stop
STL9:06 amLambert-St Louis
$151
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Chicago Midway Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 26, 2025.
Use the filters below to find and compare flights from St. Louis to Chicago Midway Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Mon 9/8

4:00 pm-11:20 pm

1 stop7h 20m

Chicago Midway

Thu 9/11

6:20 am-3:04 pm

1 stop8h 44m

$143

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Thu 9/11

4:00 pm-11:20 pm

1 stop7h 20m

Chicago Midway

Thu 9/18

6:20 am-3:04 pm

1 stop8h 44m

$144

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Mon 9/8

4:00 pm-11:20 pm

1 stop7h 20m

Chicago Midway

Fri 9/12

4:48 pm-9:06 am

1 stop16h 18m

$151

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Fri 10/24

11:11 am-4:57 pm

1 stop5h 46m

Chicago Midway

Sun 10/26

6:24 pm-9:07 am

1 stop14h 43m

$157

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Fri 10/17

6:05 pm-10:21 am

1 stop16h 16m

Chicago Midway

Mon 10/20

6:24 pm-9:07 am

1 stop14h 43m

$163

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Mon 10/13

6:30 pm-7:40 pm

Nonstop1h 10m

Chicago Midway

Tue 10/14

5:45 am-6:55 am

Nonstop1h 10m

$227

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Mon 9/22

7:20 am-8:30 am

Nonstop1h 10m

Chicago Midway

Mon 9/29

7:30 am-8:40 am

Nonstop1h 10m

$237

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Tue 10/7

6:00 am-12:28 pm

2 stops6h 28m

Chicago Midway

Wed 10/8

10:35 am-2:43 pm

1 stop4h 08m

$242

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Sat 9/13

6:00 am-12:28 pm

2 stops6h 28m

Chicago Midway

Tue 9/16

6:00 am-12:21 pm

1 stop6h 21m

$252

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Mon 9/22

4:00 pm-11:20 pm

1 stop7h 20m

Chicago Midway

Mon 9/29

7:03 pm-9:06 am

2 stops14h 03m

$273

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

How to get the cheapest flight ticket from St. Louis to Chicago Midway Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Chicago Midway Airport?

The month of December is, on average, the cheapest month to fly to Chicago Midway Airport from St. Louis, with most prices found around $243. If you are unable to visit Chicago Midway Airport during the month of December, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $252.

What is the cheapest day to depart on your flight to Chicago Midway Airport?

According to our data, Tuesday is the cheapest day to fly to Chicago Midway Airport from St. Louis. The lowest ticket price found for a Tuesday departure recently was $364. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $415.

What is the cheapest time of day to depart on your flight to Chicago Midway Airport?

Flying to Chicago Midway Airport from St. Louis in the evening is the least expensive time of day to depart. momondo users have found prices as low as $360 when looking at flights departing in the evening. Try not to purchase tickets at noon because they tend to be around $387. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Lambert-St Louis to Chicago Midway flight route?

Fly from Lambert-St Louis to Chicago Midway for the best Lambert-St Louis - Chicago Midway flight prices

What cabin class options are available on Lambert-St Louis to Chicago Midway flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Chicago Midway flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When to book flights from St. Louis to Chicago Midway Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Chicago Midway Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Chicago Midway Airport (STL to MDW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Chicago Midway Airport

Best Price Found

$193

Fastest flight time

1h 05m

Direct flights

Every day
The best one-way flight to Chicago Midway Airport from St. Louis in the past 72 hours is $193. The best round-trip flight deal from St. Louis to Chicago Midway Airport found on momondo in the last 72 hours is $169.
The fastest flight from St. Louis to Chicago Midway Airport takes 1h 05m
Direct flights go from St. Louis to Chicago Midway Airport every day.
Search flight deals

  • How far is Lambert-St Louis to Chicago Midway by plane?

    The distance between Lambert-St Louis and Chicago Midway is about 253.6 mi. Typically, this will take 1h 05m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Chicago Midway Airport?

    Prices for flights from Lambert-St Louis Airport to Chicago Midway Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Chicago Midway Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Chicago Midway Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Chicago Midway Airport.

  • What documentation or ID do you need to fly to Chicago Midway Airport?

    The travel and health documents you'll need for your trip to Chicago Midway Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago Midway Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Chicago Midway Airport?

  • What is the most popular airline from St. Louis to Chicago Midway Airport?

Best airlines flying from St. Louis to Chicago Midway Airport

Compare and see reviews for airlines that fly from St. Louis to Chicago Midway Airport with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $146Free CancellationRating
8.0
4,243 reviews
Search Southwest flights

  • Southwest Flights From St. Louis to Chicago Midway Airport

    Across 27 Southwest flights from St. Louis to Chicago Midway Airport this week, the average price was $287, with the best Southwest deals starting from $146 round-trip. 4,243 users have rated Southwest on momondo, with an average score of 8.0/10.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Lansing
Portage
Schererville
Valparaiso
Crown Point
Munster
Chesterton
Monticello
Porter
Griffith
Saint John

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Chicago?

Finding the right flight to Chicago from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.

Can I find flights from St. Louis to Chicago with flexible booking policies on momondo?

Flights from St. Louis to Chicago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Chicago?

momondo provides multiple filters to help you find the best flight to Chicago from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Chicago right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from St. Louis and alert you when they change.

An easier way to manage your Chicago Midway Airport trip

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