What are the cheapest airlines flying from Chicago O'Hare Intl Airport to St. Louis round-trip?

Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $90. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $91 and $134, respectively. American Airlines is 66% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to St. Louis one-way?

$46 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Southwest and Southern / Mokulele, with prices starting from $49 and $85, respectively.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the cheapest flights from Chicago O'Hare Intl Airport to St. Louis?

While on average a flight from Chicago O'Hare Intl Airport to St. Louis is generally $229, our data shows the cheapest flight currently is $45. When looking at the most popular route, (Chicago O'Hare Intl - Lambert-St Louis), you can expect to pay $77 for that flight.

What are the most reliable airlines from Chicago O'Hare Intl Airport to St. Louis?

Before booking your flight to St. Louis from Chicago O'Hare Intl Airport, check out the most reliable airlines to get you to your destination on time: Republic Airways (88%), Envoy Air (88%), SkyWest Airlines( 83%).

What are the most popular airlines that fly from Chicago O'Hare Intl Airport to St. Louis?

Before booking your flight from Chicago O'Hare Intl Airport to St. Louis check out the most popular airlines for this route: Southern / Mokulele, American Airlines or United Airlines.

What is the cheapest day to fly round-trip from Chicago O'Hare Intl Airport to St. Louis?

Travelers have found that booking a Thursday departure is the best way to save up to 65% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

Find a great deal and save up to 187% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Chicago O'Hare Intl Airport to St. Louis within the next two weeks, with the cheapest ticket starting at $336.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to St. Louis?

Our data shows that September tends to be the cheapest month to fly to St. Louis from Chicago O'Hare Intl Airport. Users have commonly found prices around $291 for the month, but tickets can be as low as $107. Due to multiple factors, prepare for potentially higher prices in July.

What airport do you fly into for flights to St. Louis from Chicago O'Hare Intl?

Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Chicago O'Hare Intl. On average, Lambert-St Louis has 66 inbound flights from Chicago O'Hare Intl per day from 3 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Can I find deals for flights from O'Hare Intl to St. Louis that include hotel bookings?

Yes. In addition to deals on O'Hare Intl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from O'Hare Intl to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to St. Louis.

Can I find deals for business class flights from O'Hare Intl to St. Louis?

Yes. Cheapflights offers flight deals from O'Hare Intl to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$46+ Flights from Chicago O'Hare Intl Airport to St. Louis

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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Lambert-St Louis are usually found in September or August, booked 82 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from O'Hare Intl to St. Louis

Round-trip from	$90 (American Airlines)
One-way from	$46 (American Airlines)
Popular in	December
Cheapest in	September
Average price	$300
Good round-trip deal	$151 or less
Good one-way deal	$133 or less

From Chicago O'Hare Intl to Lambert-St Louis

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One-way flight from Chicago O'Hare Intl to Lambert-St Louis

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Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Chicago O'Hare Intl to Lambert-St Louis.

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Price to beat on a one-way flight from Chicago O'Hare Intl to Lambert-St Louis.

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Find flight deals from O'Hare Intl to St. Louis

Cheapest flights from O'Hare Intl to St. Louis
Explore the most affordable flight options available from O'Hare Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Sat 9/207:10 pmORD - STL

Nonstop1h 22mAmerican Airlines

Sat 10/47:23 amSTL - ORD

Nonstop1h 22mAmerican Airlines

Deal found 7/26

$90

Sat 8/232:20 pmORD - STL

Nonstop1h 24mUnited Airlines

Sat 8/305:30 pmSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 7/26

$91

Fri 8/222:55 pmORD - STL

1 stop4h 15mSouthwest

Mon 8/255:30 amSTL - ORD

1 stop7h 15mSouthwest

Deal found 7/26

$134

Sat 8/166:55 amORD - STL

Nonstop1h 25mSouthern / Mokulele

Sun 8/175:15 pmSTL - ORD

1 stop3h 37mSouthern / Mokulele

Deal found 7/26

$136

Tue 9/97:20 amORD - STL

1 stop25h 46mFrontier

Tue 9/167:55 pmSTL - ORD

1 stop25h 33mFrontier

Deal found 7/26

$161

Tue 8/261:30 pmORD - STL

1 stop5h 37mDelta

Sun 8/315:11 pmSTL - ORD

1 stop6h 45mDelta

Deal found 7/28

$177

Mon 8/111:10 pmORD - STL

1 stop3h 35mMultiple Airlines

Tue 8/125:40 pmSTL - ORD

1 stop16h 34mMultiple Airlines

Deal found 7/27

$206

Best flights from O'Hare Intl to St. Louis
Discover carefully curated flight deals from O'Hare Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Sat 9/207:10 pmORD - STL

Nonstop1h 22mAmerican Airlines

Sat 10/45:25 pmSTL - ORD

Nonstop1h 33mAmerican Airlines

Deal found 7/27

$90

Sat 8/232:20 pmORD - STL

Nonstop1h 24mUnited Airlines

Sat 8/305:30 pmSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 7/26

$91

Fri 8/222:55 pmORD - STL

1 stop4h 15mSouthwest

Mon 8/255:30 amSTL - ORD

1 stop7h 15mSouthwest

Deal found 7/26

$134

Sat 8/166:55 amORD - STL

Nonstop1h 25mSouthern / Mokulele

Sun 8/175:15 pmSTL - ORD

1 stop3h 37mSouthern / Mokulele

Deal found 7/26

$136

Tue 9/97:20 amORD - STL

1 stop25h 46mFrontier

Tue 9/167:55 pmSTL - ORD

1 stop25h 33mFrontier

Deal found 7/26

$161

Tue 8/261:30 pmORD - STL

1 stop5h 37mDelta

Sun 8/315:11 pmSTL - ORD

1 stop6h 45mDelta

Deal found 7/28

$177

Thu 9/118:15 amORD - STL

1 stop8h 20mMultiple Airlines

Thu 9/187:04 pmSTL - ORD

Nonstop1h 32mMultiple Airlines

Deal found 7/27

$200

Last-minute flights from O'Hare Intl to St. Louis
Discover last-minute flight deals from O'Hare Intl to St. Louis. Data last updated July 28, 2025 and is based on user searches.

Sat 8/25:01 amORD - STL

1 stop8h 58mFrontier

Sat 8/92:52 pmSTL - ORD

1 stop8h 37mFrontier

Deal found 7/27

$178

Sat 8/25:01 amORD - STL

1 stop8h 58mMultiple Airlines

Sun 8/35:15 pmSTL - ORD

1 stop3h 37mMultiple Airlines

Deal found 7/26

$213

Sat 8/21:11 pmORD - STL

Nonstop1h 26mUnited Airlines

Sat 8/25:30 pmSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 7/26

$556

Mon 8/48:15 amORD - STL

1 stop3h 55mSouthern / Mokulele

Sun 8/105:15 pmSTL - ORD

1 stop3h 37mSouthern / Mokulele

Deal found 7/27

$204

Mon 8/410:36 pmORD - STL

Nonstop1h 15mAmerican Airlines

Thu 8/74:19 pmSTL - ORD

Nonstop1h 26mAmerican Airlines

Deal found 7/25

$482

Mon 8/47:00 amORD - STL

1 stop7h 35mSouthwest

Thu 8/77:15 amSTL - ORD

2 stops9h 10mSouthwest

Deal found 7/25

$569

Thu 8/76:02 pmORD - STL

2 stops15h 50mSpirit Airlines

Sat 8/910:45 amSTL - ORD

2 stops20h 19mSpirit Airlines

Deal found 7/25

$265

Mon 8/111:10 pmORD - STL

1 stop3h 35mMultiple Airlines

Tue 8/125:40 pmSTL - ORD

1 stop16h 34mMultiple Airlines

Deal found 7/27

$206

Sat 8/166:55 amORD - STL

Nonstop1h 25mSouthern / Mokulele

Sun 8/175:15 pmSTL - ORD

1 stop3h 37mSouthern / Mokulele

Deal found 7/26

$136

Fri 8/2210:34 pmORD - STL

Nonstop1h 17mAmerican Airlines

Wed 8/276:06 amSTL - ORD

Nonstop1h 24mAmerican Airlines

Deal found 7/26

$121

Fri 8/222:55 pmORD - STL

1 stop4h 15mSouthwest

Mon 8/255:30 amSTL - ORD

1 stop7h 15mSouthwest

Deal found 7/26

$134

Sat 8/232:20 pmORD - STL

Nonstop1h 24mUnited Airlines

Sat 8/305:30 pmSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 7/26

$91

One-way flights from O'Hare Intl to St. Louis
Search for one-way flight options from O'Hare Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 28, 2025.

Wed 8/207:30 pmORD - STL

Nonstop1h 22mAmerican Airlines

Deal found 7/27

$46

Sat 9/131:30 pmORD - STL

1 stop6h 45mSouthwest

Deal found 7/25

$49

Fri 9/51:10 pmORD - STL

1 stop3h 25mSouthern / Mokulele

Deal found 7/28

$85

Wed 8/207:15 amORD - STL

1 stop6h 05mDelta

Deal found 7/28

$89

Sat 8/25:01 amORD - STL

1 stop8h 58mFrontier

Deal found 7/25

$95

Wed 9/1712:55 pmORD - STL

Nonstop1h 24mUnited Airlines

Deal found 7/28

$102

Wed 8/278:47 pmORD - STL

2 stops16h 45mSpirit Airlines

Deal found 7/27

$113

Wed 8/208:12 pmORD - STL

3 stops22h 29mMultiple Airlines

Deal found 7/27

$131

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 9/20

7:10 pm-8:32 pm

Nonstop1h 22m

Lambert-St Louis

Sat 10/4

7:23 am-8:45 am

Nonstop1h 22m

$90

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/23

2:20 pm-3:44 pm

Nonstop1h 24m

Lambert-St Louis

Sat 8/30

5:30 pm-6:55 pm

Nonstop1h 25m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 8/22

2:55 pm-7:10 pm

1 stop4h 15m

Lambert-St Louis

Mon 8/25

5:30 am-12:45 pm

1 stop7h 15m

$134

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/16

6:55 am-8:20 am

Nonstop1h 25m

Lambert-St Louis

Sun 8/17

5:15 pm-8:52 pm

1 stop3h 37m

$136

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 9/9

7:20 am-9:06 am

1 stop25h 46m

Lambert-St Louis

Tue 9/16

7:55 pm-9:28 pm

1 stop25h 33m

$161

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 8/26

1:30 pm-7:07 pm

1 stop5h 37m

Lambert-St Louis

Sun 8/31

5:11 pm-11:56 pm

1 stop6h 45m

$177

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/11

8:15 am-4:35 pm

1 stop8h 20m

Lambert-St Louis

Thu 9/18

7:04 pm-8:36 pm

Nonstop1h 32m

$200

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 8/20

7:30 pm-8:52 pm

Nonstop1h 22m

$46

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 9/13

1:30 pm-8:15 pm

1 stop6h 45m

$49

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 9/5

1:10 pm-4:35 pm

1 stop3h 25m

$85

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 15 results

The best insider tips for Chicago O'Hare Intl Airport to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to St. Louis trip

Airports

ORD

For a quick departure, use the "L" train to avoid traffic and reach ORD efficiently from downtown Chicago.

STL

Use the MetroLink light rail for a convenient and economical ride from STL to downtown St. Louis in about 40 minutes.

Our travel experts

Ramsey Qubein

Expert on ORD

Taryn White

Expert on STL

Best time to book a flight from O'Hare Intl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from O'Hare Intl with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to St. Louis

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

The price you pay for your flight from Chicago O'Hare Intl Airport to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 78 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to St. Louis (average of $311). Flying from Chicago O'Hare Intl Airport to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to STL?

It’s typically best to fly out from Chicago O'Hare Intl Airport to St. Louis in the evening. Doing so could potentially save you 11% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to St. Louis?

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to St. Louis flight should consider departing on Friday evenings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago O'Hare Intl Airport to St. Louis

The most flights from ORD to STL are scheduled on a Sunday (72 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (61 on average).

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Chicago O'Hare Intl Airport to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,237 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Southwest

8.0

Very good

4,237 reviews

Southwest

8.0

Very good

4,237 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Delta

8.0

Very good

7,971 reviews

Southwest

8.0

Very good

4,237 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

United Airlines

7.4

Good

8,893 reviews

Southwest

8.0

Very good

4,237 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,237 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Related info for your journey

What airport do you fly into for flights to St. Louis from Chicago O'Hare Intl?
Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Chicago O'Hare Intl. On average, Lambert-St Louis has 66 inbound flights from Chicago O'Hare Intl per day from 3 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
What are the cheapest airlines flying from Chicago O'Hare Intl Airport to St. Louis round-trip?
Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $90. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $91 and $134, respectively. American Airlines is 66% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to St. Louis one-way?
$46 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Southwest and Southern / Mokulele, with prices starting from $49 and $85, respectively.
What are the most reliable airlines from Chicago O'Hare Intl Airport to St. Louis?
Before booking your flight to St. Louis from Chicago O'Hare Intl Airport, check out the most reliable airlines to get you to your destination on time: Republic Airways (88%), Envoy Air (88%), SkyWest Airlines( 83%).
What are the cheapest flights from Chicago O'Hare Intl Airport to St. Louis?
While on average a flight from Chicago O'Hare Intl Airport to St. Louis is generally $229, our data shows the cheapest flight currently is $45. When looking at the most popular route, (Chicago O'Hare Intl - Lambert-St Louis), you can expect to pay $77 for that flight.
Can I find deals for flights from O'Hare Intl to St. Louis that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to St. Louis.
Can I find deals for business class flights from O'Hare Intl to St. Louis?
Yes. Cheapflights offers flight deals from O'Hare Intl to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to St. Louis (average of $311). Flying from Chicago O'Hare Intl Airport to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Eureka

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Glencoe

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Festus

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Farmington

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Top 3 airlines flying from O'Hare Intl to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$115	Average$283	FlexibilityNo cancel fee	On-time71%
Southern / Mokulele	Cheapest$118	Average$213	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$152	Average$322	FlexibilityNo cancel fee	On-time69%

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$46+ Cheap flights from O'Hare Intl (ORD) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from O'Hare Intl to St. Louis with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

Cheapflights Tip: The best prices from Chicago O'Hare Intl to Lambert-St Louis are usually found in September or August, booked 82 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from O'Hare Intl to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from O'Hare Intl to St. Louis

Cheapest flights from O'Hare Intl to St. LouisExplore the most affordable flight options available from O'Hare Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Explore the most affordable flight options available from O'Hare Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Cheapflights Fare Finder

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

The best insider tips for Chicago O'Hare Intl Airport to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to St. Louis trip

Airports

ORD

STL

Our travel experts

Best time to book a flight from O'Hare Intl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from O'Hare Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to St. Louis

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to St. Louis. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?

What is the cheapest time of day to fly from ORD to STL?

Find hourly flight availability from O'Hare Intl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to St. Louis. Price data was last updated on July 27, 2025.

Weekly flight availability from Chicago O'Hare Intl Airport to St. Louis

Explore weekly flight availability from O'Hare Intl to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2025.

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Chicago O'Hare Intl Airport to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to St. Louis from Chicago O'Hare Intl?

What are the cheapest airlines flying from Chicago O'Hare Intl Airport to St. Louis round-trip?

What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to St. Louis one-way?

What are the most reliable airlines from Chicago O'Hare Intl Airport to St. Louis?

What are the cheapest flights from Chicago O'Hare Intl Airport to St. Louis?

Can I find deals for flights from O'Hare Intl to St. Louis that include hotel bookings?

How can I find direct flights from O'Hare Intl to St. Louis?

Can I find deals for business class flights from O'Hare Intl to St. Louis?

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?

Traveling to a place near St. Louis?

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Alternative routes for O'Hare Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from O'Hare Intl to St. Louis

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Cheapest flights from O'Hare Intl to St. Louis
Explore the most affordable flight options available from O'Hare Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.