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Cheap flights from St. Louis to Chicago from $58

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:02 pm - 9:29 pmSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
9h 27m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
7:25 am - 11:04 amORD  Chicago O'Hare Intl-STL Lambert-St Louis
27h 39m1 stop Denver Intl
$134Frontier
Mon, Dec 7 - Tue, Dec 8
American Airlines Logo
5:23 pm - 6:59 pmSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
1h 36mnonstop
American Airlines Logo
5:41 pm - 7:06 pmORD  Chicago O'Hare Intl-STL Lambert-St Louis
1h 25mnonstop
$139American Airlines
Sat, Dec 5 - Sat, Dec 12
United Airlines Logo
9:05 am - 10:48 amSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
1h 43mnonstop
United Airlines Logo
9:45 pm - 11:20 pmORD  Chicago O'Hare Intl-STL Lambert-St Louis
1h 35mnonstop
$139United Airlines
Tue, Jan 5 - Tue, Jan 19
United Airlines Logo
8:05 am - 9:45 amSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
1h 40mnonstop
United Airlines Logo
3:35 pm - 5:13 pmORD  Chicago O'Hare Intl-STL Lambert-St Louis
1h 38mnonstop
$139United Airlines
Tue, Jan 5 - Wed, Jan 20
American Airlines Logo
6:00 am - 7:33 amSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
1h 33mnonstop
American Airlines Logo
10:39 pm - 11:57 pmORD  Chicago O'Hare Intl-STL Lambert-St Louis
1h 18mnonstop
$139American Airlines
Tue, Jan 5 - Tue, Jan 12
American Airlines Logo
1:51 pm - 3:19 pmSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
1h 28mnonstop
American Airlines Logo
9:09 pm - 10:34 pmORD  Chicago O'Hare Intl-STL Lambert-St Louis
1h 25mnonstop
$139American Airlines
Tue, Jan 5 - Tue, Jan 19
Frontier Logo
4:46 pm - 12:56 amSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
8h 10m1 stop Orlando
Frontier Logo
5:47 pm - 12:41 amORD  Chicago O'Hare Intl-STL Lambert-St Louis
6h 54m1 stop Orlando
$143Frontier
Thu, Dec 17 - Mon, Dec 21
Frontier Logo
12:05 pm - 9:35 pmSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
9h 30m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
5:24 pm - 12:12 amORD  Chicago O'Hare Intl-STL Lambert-St Louis
6h 48m1 stop Orlando
$143Frontier
Wed, Dec 2 - Wed, Dec 9
Frontier Logo
6:20 pm - 1:08 amSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
6h 48m1 stop Orlando
Frontier Logo
5:47 pm - 12:41 amORD  Chicago O'Hare Intl-STL Lambert-St Louis
6h 54m1 stop Orlando
$143Frontier
Mon, Dec 14 - Thu, Dec 17
United Airlines Logo
8:05 am - 9:45 amSTL  Lambert-St Louis-ORD Chicago O'Hare Intl
1h 40mnonstop
United Airlines Logo
9:45 pm - 11:20 pmORD  Chicago O'Hare Intl-STL Lambert-St Louis
1h 35mnonstop
$169United Airlines
Thu, Jan 7 - Thu, Jan 14

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Delta flights from St. Louis to Chicago O'Hare Intl Airport

Our best Delta deals on St. Louis to Chicago O'Hare Intl Airport flight tickets
Delta
Feb 2
STL10:57 amLambert-St Louis
5h 29m
1 stop
ORD4:26 pmChicago O'Hare Intl
Feb 4
ORD10:33 amChicago O'Hare Intl
6h 04m
1 stop
STL4:37 pmLambert-St Louis
$157
Delta
Jan 5
STL10:57 amLambert-St Louis
5h 30m
1 stop
ORD4:27 pmChicago O'Hare Intl
Jan 20
ORD1:54 pmChicago O'Hare Intl
6h 56m
1 stop
STL8:50 pmLambert-St Louis
$159
Delta
Dec 5
STL4:38 pmLambert-St Louis
3h 37m
1 stop
ORD8:15 pmChicago O'Hare Intl
Dec 7
ORD2:41 pmChicago O'Hare Intl
5h 51m
1 stop
STL8:32 pmLambert-St Louis
$174

Frontier flights from St. Louis to Chicago O'Hare Intl Airport

Our best Frontier deals on St. Louis to Chicago O'Hare Intl Airport flight tickets
Frontier
Dec 7
STL12:02 pmLambert-St Louis
9h 27m
1 stop
ORD9:29 pmChicago O'Hare Intl
Dec 8
ORD7:25 amChicago O'Hare Intl
27h 39m
1 stop
STL11:04 amLambert-St Louis
$134
Frontier
Dec 18
STL4:21 pmLambert-St Louis
8h 05m
1 stop
ORD12:26 amChicago O'Hare Intl
Dec 21
ORD5:47 pmChicago O'Hare Intl
6h 54m
1 stop
STL12:41 amLambert-St Louis
$143
Frontier
Dec 7
STL12:02 pmLambert-St Louis
9h 27m
1 stop
ORD9:29 pmChicago O'Hare Intl
Dec 10
ORD7:25 amChicago O'Hare Intl
27h 32m
1 stop
STL10:57 amLambert-St Louis
$152

momondo Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Mon 12/7

12:02 pm-9:29 pm

1 stop9h 27m

Chicago O'Hare Intl

Tue 12/8

7:25 am-11:04 am

1 stop27h 39m

$134

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Sat 12/5

5:23 pm-6:59 pm

Nonstop1h 36m

Chicago O'Hare Intl

Sat 12/12

5:41 pm-7:06 pm

Nonstop1h 25m

$139

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Tue 1/5

9:05 am-10:48 am

Nonstop1h 43m

Chicago O'Hare Intl

Tue 1/19

9:45 pm-11:20 pm

Nonstop1h 35m

$139

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Tue 1/5

8:05 am-9:45 am

Nonstop1h 40m

Chicago O'Hare Intl

Wed 1/20

3:35 pm-5:13 pm

Nonstop1h 38m

$139
Quickest round-trip

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Tue 1/5

6:00 am-7:33 am

Nonstop1h 33m

Chicago O'Hare Intl

Tue 1/12

10:39 pm-11:57 pm

Nonstop1h 18m

$139

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Tue 1/5

1:51 pm-3:19 pm

Nonstop1h 28m

Chicago O'Hare Intl

Tue 1/19

9:09 pm-10:34 pm

Nonstop1h 25m

$139

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Thu 12/17

4:46 pm-12:56 am

1 stop8h 10m

Chicago O'Hare Intl

Mon 12/21

5:47 pm-12:41 am

1 stop6h 54m

$143

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Wed 12/2

12:05 pm-9:35 pm

1 stop9h 30m

Chicago O'Hare Intl

Wed 12/9

5:24 pm-12:12 am

1 stop6h 48m

$143

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Mon 12/14

6:20 pm-1:08 am

1 stop6h 48m

Chicago O'Hare Intl

Thu 12/17

5:47 pm-12:41 am

1 stop6h 54m

$143

St. LouisChicago

STL Lambert-St Louis - ORD Chicago O'Hare Intl

STLORD

Lambert-St Louis

Thu 1/7

8:05 am-9:45 am

Nonstop1h 40m

Chicago O'Hare Intl

Thu 1/14

9:45 pm-11:20 pm

Nonstop1h 35m

$169

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 O'Hare Intl 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 typical price of a round-trip flight between St. Louis and Chicago O'Hare Intl Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $279 to $455.
The lowest price recently found on this route was $134.

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from St. Louis averaging around $326.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Friday when prices can be found for as low as $726. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday 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 $925.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $631 when looking at flights departing in the morning. Try not to purchase tickets at noon because they tend to be around $1,179. 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 O'Hare Intl flight route?

Fly from Lambert-St Louis to Chicago O'Hare Intl for the best Lambert-St Louis - Chicago O'Hare Intl flight prices

How far in advance should I book a flight from St. Louis to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $373 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from St. Louis for as low as $117 on momondo.

What cabin class options are available on St. Louis to Chicago O'Hare Intl Airport flights?

There are 4 cabin classes available to choose from on St. Louis to Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Chicago O'Hare Intl Airport flight prices changed over time?

As of November 2026, prices for St. Louis to Chicago O'Hare Intl Airport flights are approximately 67% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Chicago O'Hare Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Chicago O'Hare Intl 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 O'Hare Intl Airport (STL to ORD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Chicago O'Hare Intl Airport

Best Price Found

$58

Fastest flight time

1h 22m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from St. Louis in the past 72 hours is $58. The best round-trip flight deal from St. Louis to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $134.
The fastest flight from St. Louis to Chicago O'Hare Intl Airport takes 1h 22m
Direct flights go from St. Louis to Chicago O'Hare Intl Airport every day.
Search flight deals

Frequently asked questions about flying from St. Louis to Chicago O'Hare Intl Airport

  • How far is Lambert-St Louis to Chicago O'Hare Intl by plane?

    Lambert-St Louis and Chicago O'Hare Intl are 261.0 mi apart from one another. Typically, this will take 1h 22m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Chicago O'Hare Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Chicago O'Hare Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Chicago O'Hare Intl 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 O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The travel and health documents you'll need for your trip to Chicago O'Hare Intl 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 O'Hare Intl 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 O'Hare Intl Airport?

  • What is the most popular airline from St. Louis to Chicago O'Hare Intl Airport?

Best airlines flying from St. Louis to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $117Free CancellationRating
7.0
12,228 reviews
Search American Airlines flights
United AirlinesPriceFrom $193Free CancellationRating
7.3
10,469 reviews
Search United Airlines flights

  • United Airlines Flights From St. Louis to Chicago O'Hare Intl Airport

    The lowest priced United Airlines flight from St. Louis to Chicago O'Hare Intl Airport from the last 72 hours was $193. Generally, United Airlines has 45 flights on this route every week with an average price of $443. United Airlines is rated 7.3/10 by our users.

  • American Airlines Flights From St. Louis to Chicago O'Hare Intl Airport

    American Airlines is also a popular choice for this route. American Airlines flight deals for St. Louis to Chicago O'Hare Intl Airport start from as low as $117 round-trip, depending on your selected dates, with average American Airlines deals seen on momondo around $316. American Airlines operates 38 flights to Chicago O'Hare Intl Airport from St. Louis in an average week. Users have rated it 7.0/10 across 12,228 reviews.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
Schaumburg
Merrillville
Rockford
South Haven
Oak Brook
Rosemont
Gurnee
Orland Park
Joliet
Naperville
New Buffalo
Kenosha
Hammond
Aurora
Racine
Elgin
Janesville
Skokie
Waukegan

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from St. Louis.

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

Yes. All flights to Chicago from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential St. Louis to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of St. Louis to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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