St. Louis

$54+ Cheap flights from Chicago (CHI) 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — STL
nov. 4 — nov. 111
1 adult
lun. 11/4
lun. 11/11
We work with more than 300 partners to bring you better travel deals

...and more

Find cheap flights from Chicago to St. Louis with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Chicago to Lambert-St Louis are usually found in May or March, booked 84 days in advance, depart on a Saturday or Thursday and return on a Tuesday

Cheap flight deals from Chicago to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 octubre 30, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

January

Cheapest in

May

Round-trip from

$105
(Mytrip)

One-way from

$54
(Frontier)
Provider with most accurate pricing for Chicago (CHI)-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Chicago (CHI)-Lambert-St Louis flights.
High demand for flights, 18% potential price rise
Best time to find cheap flights, 13% potential price drop
From Chicago (CHI) to Lambert-St Louis
One-way flight from Chicago (CHI) to Lambert-St Louis

Find flight deals from Chicago to St. Louis

Cheapest flights from Chicago to St. Louis
Explore the most affordable flight options available from Chicago to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 30, 2024.

This Mytrip deal was found by Cheapflights users on 10/29. 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.
jue. 12/58:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
lun. 12/912:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 10/29$111
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/129:45 amMDW - STL
1 stop13h 28mFrontier
mié. 11/135:27 pmSTL - MDW
1 stop18h 46mFrontier
Deal found 10/29$118
This Frontier deal was found by Cheapflights users on 10/29. 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.
jue. 11/148:48 pmORD - STL
1 stop11h 08mFrontier
vie. 11/157:30 pmSTL - ORD
1 stop5h 29mFrontier
Deal found 10/29$118
This Priceline deal was found by Cheapflights users on 10/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/194:44 pmORD - STL
1 stop6h 29mMultiple Airlines
mié. 11/2012:00 pmSTL - ORD
1 stop4h 10mMultiple Airlines
Deal found 10/30$122
This American Airlines deal was found by Cheapflights users on 10/30. 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.
jue. 12/58:50 pmORD - STL
Nonstop1h 23mAmerican Airlines
dom. 12/85:45 amSTL - ORD
Nonstop1h 22mAmerican Airlines
Deal found 10/30$195
This Southwest deal was found by Cheapflights users on 10/30. 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.
jue. 12/57:25 pmMDW - STL
Nonstop1h 15mSouthwest
dom. 12/89:55 pmSTL - MDW
Nonstop1h 10mSouthwest
Deal found 10/30$196
This Delta deal was found by Cheapflights users on 10/29. 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.
jue. 11/217:10 amORD - STL
1 stop4h 54mDelta
dom. 11/246:00 amSTL - ORD
1 stop4h 50mDelta
Deal found 10/29$215
This Delta deal was found by Cheapflights users on 10/29. 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.
mar. 11/196:00 amMDW - STL
1 stop6h 04mDelta
mié. 11/206:00 amSTL - MDW
2 stops6h 49mDelta
Deal found 10/29$219
This United Airlines deal was found by Cheapflights users on 10/29. 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.
mar. 11/192:15 pmORD - STL
Nonstop1h 24mUnited Airlines
mié. 11/206:30 amSTL - ORD
Nonstop1h 29mUnited Airlines
Deal found 10/29$257
This FareScan deal was found by Cheapflights users on 10/29. 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 FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/1511:10 amORD - STL
2 stops29h 24mSpirit Airlines
dom. 11/175:29 pmSTL - ORD
3 stops25h 47mSpirit Airlines
Deal found 10/29$266
This Southwest deal was found by Cheapflights users on 10/30. 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.
jue. 12/57:30 amORD - STL
2 stops9h 40mSouthwest
dom. 12/85:30 amSTL - ORD
1 stop8h 55mSouthwest
Deal found 10/30$270
This Mytrip deal was found by Cheapflights users on 10/28. 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.
jue. 11/146:46 pmMDW - STL
3 stops44h 44mMultiple Airlines
dom. 11/175:29 pmSTL - MDW
3 stops20h 55mMultiple Airlines
Deal found 10/28$573

Find flights from Chicago to St. Louis within your budget

Customize your flight search to find flights from Chicago 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 2,570,725 searches. Data last updated octubre 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$105 - $520

Route

Depart

Return

Price

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

lun. 3/24

1 stop11h 30m

Lambert-St Louis

lun. 4/7

1 stop19h 25m

$105

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 11/16

1 stop6h 45m

Lambert-St Louis

mié. 11/20

1 stop3h 35m

$112

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

mar. 11/12

1 stop13h 28m

Lambert-St Louis

mié. 11/13

1 stop18h 46m

$118

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 11/14

1 stop11h 08m

Lambert-St Louis

vie. 11/15

1 stop5h 29m

$118

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mar. 1/14

1 stop4h 38m

Lambert-St Louis

mar. 1/28

2 stops6h 09m

$181

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 12/5

Nonstop1h 23m

Lambert-St Louis

dom. 12/8

Nonstop1h 22m

$195

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

jue. 12/5

Nonstop1h 15m

Lambert-St Louis

dom. 12/8

Nonstop1h 10m

$196

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

mar. 11/19

1 stop6h 04m

Lambert-St Louis

mié. 11/20

2 stops6h 49m

$219

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 11/15

2 stops29h 24m

Lambert-St Louis

dom. 11/17

2 stops35h 16m

$234

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 1/1

1 stop5h 45m

Lambert-St Louis

mié. 1/1

1 stop5h 15m

$251

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mar. 11/19

Nonstop1h 24m

Lambert-St Louis

mié. 11/20

Nonstop1h 29m

$257

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

jue. 11/14

3 stops44h 44m

Lambert-St Louis

dom. 11/17

2 stops22h 32m

$520

Flights are sorted by cheapest first

Deals found on 10/30

Compare providers for flights from Chicago 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 Chicago to St. Louis in October.
ProviderPrice AccuracyTrust Score*Cancellation Policy
ExpediaPrice Accuracy1 starTrust Score*3 starsCancellation PolicyAirline Policy
FlightHubPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
eDreamsPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
MytripPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
Booking.comPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
oojoPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy

*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-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-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-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-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 Chicago to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Chicago 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 Chicago to St. Louis

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

How far ahead should I book a flight from Chicago to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to St. Louis. Price data was last updated on October 25, 2024.

The price you pay for your flight from Chicago to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 84 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 to St. Louis?

Currently, September is the cheapest month in which you can book a flight from Chicago to St. Louis (average of $308). Flying from Chicago 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 CHI to STL?

Find hourly flight availability from Chicago 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 octubre 30, 2024.

Unlike in the morning, when flights are generally more expensive, you can save up to 18% on flights from Chicago to St. Louis by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Chicago to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Chicago to St. Louis. Price data was last updated on October 27, 2024.

Travelers seeking maximum savings on their Chicago to St. Louis flight should consider departing on Saturday evenings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 octubre 30, 2024.
To help decide which airline to fly from Chicago to St. Louis, see what other customers have to say about Southern / Mokulele, Frontier and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
5,118 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Comfort

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

8.1
Very good
5,118 reviews
8.1
Very good
5,118 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Comfort

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

8.0
Very good
8,836 reviews
8.1
Very good
5,118 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Comfort

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

7.4
Good
9,240 reviews
8.1
Very good
5,118 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Comfort

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

7.3
Good
2,804 reviews
8.1
Very good
5,118 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Comfort

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

7.3
Good
10,000 reviews
8.1
Very good
5,118 reviews

Entertainment

7.7

Overall

8.1

Crew

8.7

Food

7.2

Comfort

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Chicago 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?

    If you book a flight to St. Louis from Chicago, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 38 flights from Chicago to Lambert-St Louis per day from 4 different airlines.

  • Can I find flights from Chicago to St. Louis for under $200 on Cheapflights?

    Yes, there are multiple flights from Chicago to St. Louis for under $200. The cheapest flight booked recently is on Southern / Mokulele for just $105, but on average you can expect to pay $208.

  • Are there nonstop flights from Chicago to St. Louis for under $200 on Cheapflights?

    Cheapflights has at least 3 direct flights from Chicago to St. Louis under $200. A good price for a nonstop flight from Chicago to St. Louis is less than $210.

  • Are there last-minute flights available from Chicago to St. Louis for under $200?

    There are currently 11+ open flights from Chicago to St. Louis within the next 7 days for less than $200.

  • What days are nonstop flights available from Chicago to St. Louis?

    Nonstop flights are available for this route on the following days: Sunday, Monday, Wednesday, Thursday, Friday, Saturday.

  • How many flights depart from Chicago to St. Louis on average per day?

    Travelers can expect 97 flights from Chicago to St. Louis on average per day.
    Morning (6am - Noon) - 30% of flight departures
    Afternoon (Noon - 6pm) - 41% of flight departures
    Evening (6pm - Midnight) - 29% of flight departures

  • How long is the flight from Chicago to St. Louis?

    Airlines like Southern / Mokulele, Frontier, and Delta fly from Chicago to St. Louis in about 4h 38m. The time it takes to get you to your destination can typically vary by up to 8h 50m. The distance from Chicago to St. Louis is about 259 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Chicago to St. Louis round-trip?

    Southern / Mokulele, at $105, was found to be the cheapest airline from Chicago to St. Louis.Alternate airlines to your destination round-trip include Frontier and Delta. These flights start at 60% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Chicago to St. Louis one-way?

    One-way options have recently been found by users for as low as $54 on Frontier. Other airlines that offer cheap prices include Southern / Mokulele from $61 and Southwest from $83 one-way.

  • What are the most reliable airlines from Chicago to St. Louis?

    No one likes to see their flight delayed. When booking a flight from Chicago to St. Louis consider choosing Republic Airways (100%), United Airlines (91%) or GoJet (90%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chicago to St. Louis?

    The cheapest flight price from Chicago to St. Louis is $48. On average you can expect to pay $248. The most popular route, (Chicago O'Hare Intl - Lambert-St Louis), can usually be booked for $110.

  • What does ORD to STL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Chicago O'Hare Intl Airport to Lambert-St Louis Airport flight would often be abbreviated as a ORD to STL flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD).

  • Can I find deals for flights from Chicago to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Chicago to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Chicago to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Chicago to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Chicago to St. Louis that include hotel bookings?

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

  • How can I find direct flights from Chicago to St. Louis?

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

  • Can I find deals for business class flights from Chicago to St. Louis?

    Yes. Cheapflights offers flight deals from Chicago 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.

  • Can I find deals for flights from Chicago to St. Louis that allow pets onboard?

    Many airlines flying from Chicago to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Chicago to St. Louis?

    Yes, you can often find last-minute deals on Chicago to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Chicago to St. Louis flight deals updated?

    The Chicago to St. Louis flight deals you see on this page were last updated on 10/30.

  • What is the cheapest month to book a flight from Chicago to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Chicago to St. Louis (average of $308). Flying from Chicago 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Chicago to St. Louis

Discover the top 4 airlines that operate flights from Chicago 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 2,570,725 searches. Data last updated octubre 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$102Average$267FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$137Average$306FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$143Average$168FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$181Average$328FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.