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Cheap flights from St. Louis to Chicago from $46

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 11/4. 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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Cheap round-trip flights

American Airlines Logo
7:23 am - 8:48 amSTL-ORD
1h 25mnonstop
American Airlines Logo
10:08 pm - 11:24 pmORD-STL
1h 16mnonstop
$90American Airlines
Find Deal
Sat, Aug 16 - Sat, Aug 16
American Airlines Logo
7:23 am - 8:48 amSTL-ORD
1h 25mnonstop
American Airlines Logo
6:47 pm - 8:16 pmORD-STL
1h 29mnonstop
$91American Airlines
Find Deal
Sat, Aug 9 - Sat, Aug 16
United Airlines Logo
10:00 am - 11:31 amSTL-ORD
1h 31mnonstop
United Airlines Logo
9:20 pm - 10:45 pmORD-STL
1h 25mnonstop
$97United Airlines
Find Deal
Mon, Aug 11 - Mon, Aug 18
Southwest Logo
6:35 am - 12:45 pmSTL-ORD
6h 10m1 stop
Southwest Logo
7:00 am - 1:30 pmORD-STL
6h 30m1 stop
$111Southwest
Find Deal
Sat, Aug 23 - Wed, Sep 3
Southwest Logo
8:20 am - 4:25 pmSTL-ORD
8h 05m1 stop
Southwest Logo
7:30 am - 2:15 pmORD-STL
6h 45m1 stop
$116Southwest
Find Deal
Sat, Aug 9 - Sat, Aug 16
United Airlines Logo
5:00 am - 6:30 amSTL-ORD
1h 30mnonstop
United Airlines Logo
2:23 pm - 3:47 pmORD-STL
1h 24mnonstop
$139United Airlines
Find Deal
Sat, Aug 9 - Sat, Aug 9
Southern / Mokulele Logo
1:00 pm - 4:32 pmSTL-ORD
3h 32m1 stop
Southern / Mokulele Logo
8:15 am - 12:10 pmORD-STL
3h 55m1 stop
$166Southern / Mokulele
Find Deal
Thu, Aug 21 - Sun, Aug 24
Southern / Mokulele Logo
1:00 pm - 4:32 pmSTL-ORD
3h 32m1 stop
Southern / Mokulele Logo
1:10 pm - 4:45 pmORD-STL
3h 35m1 stop
$167Southern / Mokulele
Find Deal
Mon, Aug 11 - Mon, Aug 18
Delta Logo
3:30 pm - 9:34 pmSTL-ORD
6h 04m1 stop
Delta Logo
2:00 pm - 8:33 pmORD-STL
6h 33m1 stop
$177Delta
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Sat, Aug 16 - Mon, Aug 18
Delta Logo
11:29 am - 4:45 pmSTL-ORD
5h 16m1 stop
Delta Logo
2:00 pm - 11:23 pmORD-STL
9h 23m2 stops
$182Delta
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Tue, Aug 26 - Tue, Sep 2

Southern / Mokulele flights from St. Louis to Chicago O'Hare Intl Airport

Our best Southern / Mokulele deals on St. Louis to Chicago O'Hare Intl Airport flight tickets
Southern / Mokulele
Aug 21
STL1:00 pmLambert-St Louis
3h 32m
1 stop
ORD4:32 pmChicago O'Hare Intl
Aug 24
ORD8:15 amChicago O'Hare Intl
3h 55m
1 stop
STL12:10 pmLambert-St Louis
$166
Find similar
Southern / Mokulele
Aug 11
STL1:00 pmLambert-St Louis
3h 32m
1 stop
ORD4:32 pmChicago O'Hare Intl
Aug 18
ORD1:10 pmChicago O'Hare Intl
3h 35m
1 stop
STL4:45 pmLambert-St Louis
$167
Find similar
Southern / Mokulele
Aug 31
STL5:15 pmLambert-St Louis
3h 37m
1 stop
ORD8:52 pmChicago O'Hare Intl
Sep 1
ORD8:15 amChicago O'Hare Intl
3h 55m
1 stop
STL12:10 pmLambert-St Louis
$169
Find similar

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

Our best American Airlines deals on St. Louis to Chicago O'Hare Intl Airport flight tickets
American Airlines
Aug 16
STL7:23 amLambert-St Louis
1h 25m
ORD8:48 amChicago O'Hare Intl
Aug 16
ORD10:08 pmChicago O'Hare Intl
1h 16m
STL11:24 pmLambert-St Louis
$90
Find similar
American Airlines
Aug 9
STL7:23 amLambert-St Louis
1h 25m
ORD8:48 amChicago O'Hare Intl
Aug 16
ORD6:47 pmChicago O'Hare Intl
1h 29m
STL8:16 pmLambert-St Louis
$91
Find similar
American Airlines
Aug 26
STL7:23 amLambert-St Louis
1h 25m
ORD8:48 amChicago O'Hare Intl
Sep 2
ORD8:45 pmChicago O'Hare Intl
1h 32m
STL10:17 pmLambert-St Louis
$92
Find similar

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 cheapest month to fly to Chicago O'Hare Intl Airport?

The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from St. Louis averaging around $194.

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 Thursday when prices can be found for as low as $802. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday 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 $977.

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 $662 when looking at flights departing in the morning. Try not to purchase tickets at noon because they tend to be around $1,261. 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 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 $268 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 $183 on momondo.

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

There are 4 cabin classes available to choose from on Lambert-St Louis to Chicago O'Hare Intl 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 July 2025, prices for St. Louis to Chicago O'Hare Intl Airport flights are approximately 30% cheaper 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

$46

Fastest flight time

1h 23m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from St. Louis in the past 72 hours is $46. The best round-trip flight deal from St. Louis to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $90.
The fastest flight from St. Louis to Chicago O'Hare Intl Airport takes 1h 23m
Direct flights go from St. Louis to Chicago O'Hare Intl Airport every day.
Search flight deals

  • 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 24m 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 $115Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Southern / MokulelePriceFrom $125Free CancellationRating
6.4
26 reviews
Search Southern / Mokulele flights
United AirlinesPriceFrom $128Free CancellationRating
7.4
8,856 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 $128. Generally, United Airlines has 50 flights on this route every week with an average price of $315. United Airlines is rated 7.4/10 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 $115 round-trip, depending on your selected dates, with average American Airlines deals seen on momondo around $270. American Airlines operates 37 flights to Chicago O'Hare Intl Airport from St. Louis in an average week. Users have rated it 7.2/10 across 10,000 reviews.

Traveling to a place near Chicago?

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