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

Flying on Southwest is currently your cheapest option to St. Louis, with prices starting at $117. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $124 and $158, respectively. Southwest is 56% 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?

$49 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 United Airlines, with prices starting from $59 and $62, respectively.

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 $305, our data shows the cheapest flight currently is $108. When looking at the most popular route, (Chicago O'Hare Intl - Lambert-St Louis), you can expect to pay $97 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: SkyWest Airlines (89%), Republic Airways (87%), United Airlines( 85%).

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 Wednesday departure is the best way to save up to 50% 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 119% 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 $257.

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 $292 for the month, but tickets can be as low as $115. Due to multiple factors, prepare for potentially higher prices in March.

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 60 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.

$49+ Flights from Chicago O'Hare Intl Airport to St. Louis

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Lambert-St Louis are usually found in September or March, booked 67 days in advance, depart on a Thursday or Friday and return on a Thursday

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

Round-trip from	$117 (Southwest)
One-way from	$49 (American Airlines)
Popular in	December
Cheapest in	September
Average price	$303
Good round-trip deal	$287 or less
Good one-way deal	$151 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. 2% potential increase in price ($6 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 June 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 junio 12, 2025.

jue. 8/75:45 pmORD - STL

1 stop4h 50mSouthwest

lun. 8/117:15 amSTL - ORD

1 stop8h 05mSouthwest

Deal found 6/12

$117

sáb. 8/96:55 amORD - STL

Nonstop1h 25mAmerican Airlines

lun. 8/116:00 amSTL - ORD

Nonstop1h 24mAmerican Airlines

Deal found 6/11

$124

jue. 8/282:20 pmORD - STL

Nonstop1h 24mUnited Airlines

lun. 9/15:30 pmSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 6/12

$157

dom. 7/278:15 amORD - STL

1 stop8h 30mSouthern / Mokulele

dom. 8/35:15 pmSTL - ORD

1 stop3h 37mSouthern / Mokulele

Deal found 6/12

$165

jue. 9/256:00 amORD - STL

1 stop6h 25mDelta

mar. 9/307:20 amSTL - ORD

1 stop6h 53mDelta

Deal found 6/11

$177

jue. 7/318:15 amORD - STL

1 stop3h 55mMultiple Airlines

mié. 8/610:00 amSTL - ORD

Nonstop1h 31mMultiple Airlines

Deal found 6/12

$209

mié. 7/95:51 amORD - STL

2 stops28h 01mSpirit Airlines

mié. 7/1611:24 amSTL - ORD

1 stop9h 04mSpirit Airlines

Deal found 6/11

$245

sáb. 7/125:01 amORD - STL

1 stop8h 58mFrontier

sáb. 7/127:29 pmSTL - ORD

2 stops20h 14mFrontier

Deal found 6/9

$320

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 junio 12, 2025.

jue. 8/75:45 pmORD - STL

1 stop4h 50mSouthwest

lun. 8/117:15 amSTL - ORD

1 stop8h 05mSouthwest

Deal found 6/12

$117

sáb. 8/96:55 amORD - STL

Nonstop1h 25mAmerican Airlines

lun. 8/116:00 amSTL - ORD

Nonstop1h 24mAmerican Airlines

Deal found 6/11

$124

jue. 8/711:01 amORD - STL

Nonstop1h 26mUnited Airlines

lun. 8/118:00 amSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 6/12

$158

dom. 7/278:15 amORD - STL

1 stop8h 30mSouthern / Mokulele

dom. 8/35:15 pmSTL - ORD

1 stop3h 37mSouthern / Mokulele

Deal found 6/12

$165

mar. 8/199:45 amORD - STL

1 stop6h 21mDelta

mié. 8/2010:45 amSTL - ORD

1 stop5h 28mDelta

Deal found 6/12

$177

jue. 7/318:15 amORD - STL

1 stop3h 55mMultiple Airlines

mié. 8/610:00 amSTL - ORD

Nonstop1h 31mMultiple Airlines

Deal found 6/12

$209

mié. 7/95:51 amORD - STL

2 stops28h 01mSpirit Airlines

mié. 7/1611:24 amSTL - ORD

1 stop9h 04mSpirit Airlines

Deal found 6/11

$245

sáb. 7/125:01 amORD - STL

1 stop8h 58mFrontier

sáb. 7/127:29 pmSTL - ORD

2 stops20h 14mFrontier

Deal found 6/9

$320

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 junio 12, 2025 and is based on user searches.

mar. 6/1711:28 amORD - STL

1 stop12h 25mMultiple Airlines

jue. 6/191:00 pmSTL - ORD

1 stop3h 32mMultiple Airlines

Deal found 6/10

$216

mar. 6/1710:00 amORD - STL

1 stop13h 59mAlaska Airlines

jue. 6/197:20 amSTL - ORD

2 stops13h 14mAlaska Airlines

Deal found 6/10

$14,140

jue. 6/198:25 amORD - STL

1 stop11h 45mSouthern / Mokulele

lun. 9/159:20 amSTL - ORD

1 stop22h 17mSouthern / Mokulele

Deal found 6/11

$176

jue. 6/192:23 pmORD - STL

Nonstop1h 21mAmerican Airlines

lun. 9/155:55 amSTL - ORD

Nonstop1h 20mAmerican Airlines

Deal found 6/11

$359

jue. 6/1910:43 amORD - STL

2 stops30h 21mSpirit Airlines

lun. 9/158:44 amSTL - ORD

2 stops10h 33mSpirit Airlines

Deal found 6/11

$405

jue. 6/194:00 pmORD - STL

1 stop4h 45mSouthwest

lun. 9/157:50 amSTL - ORD

2 stops8h 35mSouthwest

Deal found 6/11

$441

sáb. 6/215:01 amORD - STL

1 stop9h 06mFrontier

sáb. 6/215:47 pmSTL - ORD

1 stop13h 22mFrontier

Deal found 6/10

$384

dom. 6/229:00 amORD - STL

1 stop4h 26mDelta

jue. 6/262:15 pmSTL - ORD

1 stop6h 12mDelta

Deal found 6/11

$481

dom. 6/221:30 pmORD - STL

Nonstop1h 26mUnited Airlines

mar. 6/245:27 pmSTL - ORD

Nonstop1h 25mUnited Airlines

Deal found 6/10

$491

mar. 7/11:30 pmORD - STL

1 stop7h 40mSouthwest

vie. 7/410:00 amSTL - ORD

2 stops6h 45mSouthwest

Deal found 6/10

$292

mié. 7/95:51 amORD - STL

2 stops28h 01mSpirit Airlines

mié. 7/1611:24 amSTL - ORD

1 stop9h 04mSpirit Airlines

Deal found 6/11

$245

sáb. 7/126:00 amORD - STL

1 stop4h 33mDelta

sáb. 7/125:23 pmSTL - ORD

1 stop6h 46mDelta

Deal found 6/9

$249

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 junio 12, 2025.

jue. 8/76:52 pmORD - STL

Nonstop1h 26mAmerican Airlines

Deal found 6/11

$49

jue. 8/75:45 pmORD - STL

1 stop4h 50mSouthwest

Deal found 6/10

$59

lun. 9/12:20 pmORD - STL

Nonstop1h 24mUnited Airlines

Deal found 6/10

$62

jue. 6/268:25 amORD - STL

1 stop11h 45mSouthern / Mokulele

Deal found 6/12

$83

mar. 6/1711:28 amORD - STL

1 stop12h 25mFrontier

Deal found 6/9

$99

mié. 7/166:02 pmORD - STL

2 stops15h 50mSpirit Airlines

Deal found 6/11

$118

lun. 7/144:37 pmORD - STL

2 stops26h 04mMultiple Airlines

Deal found 6/10

$128

mar. 7/152:00 pmORD - STL

2 stops9h 20mDelta

Deal found 6/10

$130

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

jue. 8/7

5:45 pm-10:35 pm

1 stop4h 50m

Lambert-St Louis

lun. 8/11

5:10 am-10:45 am

1 stop5h 35m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 8/9

6:55 am-8:20 am

Nonstop1h 25m

Lambert-St Louis

lun. 8/11

6:00 am-7:24 am

Nonstop1h 24m

$124

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 8/28

2:20 pm-3:44 pm

Nonstop1h 24m

Lambert-St Louis

lun. 9/1

5:30 pm-6:55 pm

Nonstop1h 25m

$157

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

dom. 7/27

8:15 am-4:45 pm

1 stop8h 30m

Lambert-St Louis

dom. 8/3

5:15 pm-8:52 pm

1 stop3h 37m

$165

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 9/25

6:00 am-12:25 pm

1 stop6h 25m

Lambert-St Louis

mar. 9/30

1:30 pm-6:56 pm

1 stop5h 26m

$177

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 7/31

8:15 am-12:10 pm

1 stop3h 55m

Lambert-St Louis

mié. 8/6

10:00 am-11:31 am

Nonstop1h 31m

$209

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 7/9

5:51 am-9:52 am

2 stops28h 01m

Lambert-St Louis

mié. 7/16

11:24 am-8:28 pm

1 stop9h 04m

$245

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 7/12

5:01 am-1:59 pm

1 stop8h 58m

Lambert-St Louis

sáb. 7/12

7:29 pm-3:43 pm

2 stops20h 14m

$320

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mar. 9/9

12:55 pm-2:19 pm

Nonstop1h 24m

$49

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 8/7

5:45 pm-10:35 pm

1 stop4h 50m

$59

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 16 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 67 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 18% 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 Saturday 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 Thursday (71 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (48 on average).

Rainfall in St. Louis by month

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.

Temperature in St. Louis by month

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).

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with Southwest, Delta and United Airlines from Chicago to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,287 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,950 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,790 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 60 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 Southwest is currently your cheapest option to St. Louis, with prices starting at $117. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $124 and $158, respectively. Southwest is 56% 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?
$49 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 United Airlines, with prices starting from $59 and $62, 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: SkyWest Airlines (89%), Republic Airways (87%), United Airlines( 85%).
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 $305, our data shows the cheapest flight currently is $108. When looking at the most popular route, (Chicago O'Hare Intl - Lambert-St Louis), you can expect to pay $97 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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Maryland Heights

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Collinsville

Eureka

St. Peters

Glencoe

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Farmington

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$116	Average$275	FlexibilityNo cancel fee	On-time71%
Southern / Mokulele	Cheapest$117	Average$198	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$149	Average$320	FlexibilityNo cancel fee	On-time69%

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$49+ 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 9/9. 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

2. Select your favorite providers

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 March, booked 67 days in advance, depart on a Thursday or Friday 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 junio 12, 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 junio 12, 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 June 9, 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 junio 12, 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 June 8, 2025.

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

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with Southwest, Delta and United Airlines from Chicago to St. Louis by reading reviews from past customers. Users have also rated airlines 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?

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Alternative routes for O'Hare Intl to St. Louis

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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 junio 12, 2025.