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$59+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Chicago O'Hare Intl to Lambert-St Louis are usually found in September or May, booked 90 days in advance, depart on a Thursday or Friday and return on a Friday

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

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$110
(Frontier)

One-way from

$59
(United Airlines)

Popular in

February

Cheapest in

September

Average price

$335

Good round-trip deal

$216 or less

Good one-way deal

$128 or less
Provider with most accurate pricing for Chicago O'Hare Intl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Lambert-St Louis flights.
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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. 7% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Frontier deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/39:20 amORD - STL
1 stop14h 26mFrontier
Mon 4/76:38 pmSTL - ORD
1 stop10h 27mFrontier
Deal found 2/19$110
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/68:57 pmORD - STL
Nonstop1h 17mAmerican Airlines
Mon 3/105:55 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 2/20$117
This Mytrip deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/39:20 amORD - STL
1 stop14h 26mMultiple Airlines
Thu 4/1012:15 pmSTL - ORD
1 stop3h 35mMultiple Airlines
Deal found 2/19$131
This Southwest deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/245:45 pmORD - STL
1 stop5h 00mSouthwest
Tue 4/295:55 amSTL - ORD
1 stop8h 05mSouthwest
Deal found 2/19$137
This Southern / Mokulele deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southern / Mokulele is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/138:25 amORD - STL
1 stop11h 45mSouthern / Mokulele
Sun 3/1612:15 pmSTL - ORD
1 stop19h 25mSouthern / Mokulele
Deal found 2/19$140
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/61:40 pmORD - STL
2 stops8h 37mDelta
Mon 3/105:35 pmSTL - ORD
1 stop4h 12mDelta
Deal found 2/20$182
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/32:20 pmORD - STL
Nonstop1h 27mUnited Airlines
Sun 4/68:00 amSTL - ORD
Nonstop1h 31mUnited Airlines
Deal found 2/19$207
This Mytrip deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/45:00 amORD - STL
1 stop9h 42mSpirit Airlines
Sun 3/95:38 pmSTL - ORD
2 stops31h 21mSpirit Airlines
Deal found 2/20$311

Find flights from O'Hare Intl to St. Louis within your budget

Customize your flight search to find flights from O'Hare Intl to St. Louis 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, Cheapflights users made 2,558,603 searches. Data last updated February 20, 2025.

Fly from

O'Hare Intl

Fly to

St. Louis

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 4/3

9:20 am-11:46 pm

1 stop14h 26m

Lambert-St Louis

Mon 4/7

6:38 pm-5:05 am

1 stop10h 27m

$110

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 3/6

8:57 pm-10:14 pm

Nonstop1h 17m

Lambert-St Louis

Mon 3/10

5:55 am-7:15 am

Nonstop1h 20m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 4/3

9:20 am-11:46 pm

1 stop14h 26m

Lambert-St Louis

Thu 4/10

12:15 pm-3:50 pm

1 stop3h 35m

$131

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 4/24

5:45 pm-10:45 pm

1 stop5h 00m

Lambert-St Louis

Tue 4/29

5:55 am-2:00 pm

1 stop8h 05m

$137

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 3/13

8:25 am-8:10 pm

1 stop11h 45m

Lambert-St Louis

Sun 3/16

12:15 pm-7:40 am

1 stop19h 25m

$140

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 3/6

1:40 pm-10:17 pm

2 stops8h 37m

Lambert-St Louis

Mon 3/10

5:35 pm-9:47 pm

1 stop4h 12m

$182

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 4/3

2:20 pm-3:47 pm

Nonstop1h 27m

Lambert-St Louis

Sun 4/6

8:00 am-9:31 am

Nonstop1h 31m

$207

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 3/4

5:00 am-2:42 pm

1 stop9h 42m

Lambert-St Louis

Sun 3/9

5:38 pm-12:59 am

2 stops31h 21m

$311

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 4/1

2:20 pm-3:47 pm

Nonstop1h 27m

$59

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 4/14

8:55 am-11:46 pm

1 stop14h 51m

$62

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 16 results
1
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Compare providers for flights from O'Hare Intl to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to St. Louis in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from O'Hare Intl to St. Louis

Get recent, data-driven insights about flights from O'Hare Intl to St. Louis including ideal travel times, pricing trends, and more.

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 February 14, 2025.

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 88 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?

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 February 20, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to St. Louis in the afternoon. Doing so could potentially save you 13% 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?

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 February 16, 2025.

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

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 February 20, 2025.

The most flights from ORD to STL are scheduled on a Thursday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

Rainfall in St. Louis by month

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

Plan your trip to St. Louis by taking into account the average temperature totals 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 insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated February 20, 2025.
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
8.1
Very good
4,412 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,412 reviews
Southwest
8.1
Very good
4,412 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,227 reviews
Southwest
8.1
Very good
4,412 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,771 reviews
Southwest
8.1
Very good
4,412 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,412 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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?

    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 44 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 Frontier is currently your cheapest option to St. Louis, with prices starting at $110. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $117 and $137, respectively. Frontier is 59% 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?

    $59 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Frontier and Southwest, with prices starting from $62 and $69, 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 (94%), Turkish Airlines (90%), Avianca( 79%).

  • 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 $218, our data shows the cheapest flight currently is $68. When looking at the most popular route, (Chicago O'Hare Intl - Lambert-St Louis), you can expect to pay $117 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

Traveling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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

Discover the top 3 airlines that operate flights from O'Hare Intl to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$115Average$285FlexibilityNo cancel feeOn-time71%
Southern / MokuleleCheapest$117Average$178FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$131Average$307FlexibilityNo cancel feeOn-time69%
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