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Cheap Flights from Chicago (ORD) to St. Louis (STL)

View AU$113 flight on Thu, 20 Aug 2026Opens in a new window

Popular airlines from Chicago O'Hare International Airport (ORD) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from Chicago (ORD) to St. Louis (STL)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$170 Return, found 12 hours ago
AU$170
Return
found 12 hours ago
Select American Airlines flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$170 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$226 Return, found 12 hours ago
AU$226
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$226 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$227 Return, found 12 hours ago
AU$227
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$227 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$249 Return, found 12 hours ago
AU$249
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$249 found 12 hours ago
United
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$271 Return, found 12 hours ago
AU$271
Return
found 12 hours ago
Select United flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$271 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$277 Return, found 12 hours ago
AU$277
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$277 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$283 Return, found 12 hours ago
AU$283
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$283 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$284 Return, found 12 hours ago
AU$284
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$284 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$299 Return, found 12 hours ago
AU$299
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$299 found 12 hours ago
Delta
Thu, 20 Aug - Mon, 24 Aug
ORD
Chicago
STL
St. Louis
AU$304 Return, found 12 hours ago
AU$304
Return
found 12 hours ago
Select Delta flight, departing Thu, 20 Aug from Chicago to St. Louis, returning Mon, 24 Aug, priced at AU$304 found 12 hours ago

Find the cheapest month to fly from Chicago (ORD) to St. Louis (STL)

May is typically the cheapest month to fly

From AU$131 - AU$905 per traveller.

Frequently asked questions

How much does a flight from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find one-way and return flights from ORD to STL with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when ORD to STL ticket fares go up or down.
What is the cheapest month to fly from Chicago, IL (ORD) to St. Louis, MO (STL)?
The cheapest months to fly from Chicago, IL (ORD) to St. Louis, MO (STL) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are 2 airlines offering direct flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). Here are the carriers:
  • United operates 95 direct flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
  • American Airlines operates 51 direct flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
What is the cheapest airline that flies from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
American Airlines is one of the cheapest airlines offering nonstop return flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), with tickets starting from around AU$326 for flights that can be booked for departure within the next year. American Airlines also offers one of the cheapest connecting return flights on this route, with tickets starting from around AU$340. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Chicago, IL (ORD) to St. Louis, MO (STL)?
To find a cheap flight from Chicago, IL (ORD) to St. Louis, MO (STL), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, American Airlines typically offers the lowest fares. Delta offers the most daily flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Chicago, IL (ORD) to St. Louis, MO (STL)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find around 21 nonstop flights per day from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). For even more choices, look at flights that include layovers, as there are approximately 69 connecting flights per day. Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), Dallas-Fort Worth Intl. (DFW), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs at around 5:00 AM local time, operated by American Airlines. This is a seasonal service active in February and March. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find the most flights from Chicago O'Hare International Airport (ORD) to St. Louis Lambert International Airport (STL) on Thursdays, with around 55 flights available. This gives you a good selection of options if you're planning to travel mid-week. Major airlines on this route include American Airlines, Delta, and United.
What are the most popular departure times for flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) are in the morning, from 6am to 9am. Many major carriers, including American Airlines, Delta and United, offer flights during this window. Many travelers prefer these early morning flights as they allow you to arrive at your destination with plenty of time for business or leisure activities.
How long does it take to fly from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A direct flight from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically takes around 1 hour 30 minutes. This route covers a distance of approximately 415 kilometres. If you opt for a flight with one stop, your journey will usually be longer, taking about 6 hours 18 minutes. Flights with two or more stops generally take around 8 hours. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.
Can you fly business or first class from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can fly business class or first class between ORD and STL. Airlines that offer business class service on this route include:
  • Frontier Airlines
  • Delta
First class cabins are available on:
  • Alaska Airlines
  • Delta
  • United
  • American Airlines
How do I earn miles on a Chicago, IL (ORD) to St. Louis, MO (STL) flight with Expedia?
It's easy to earn miles on a Chicago, IL (ORD) to St. Louis, MO (STL) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis, MO (STL) from Chicago, IL (ORD)?
If you're planning to travel to St. Louis from O'Hare Intl. (ORD), you can fly directly into Lambert-St. Louis Intl. (STL). Some flights may connect through major hubs like Love Field (DAL), Harry Reid International Airport (LAS), or Denver Intl. (DEN) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Chicago, IL (ORD-O'Hare Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Chicago, IL (ORD) to St. Louis, MO (STL)?
If you booked your Chicago, IL (ORD) to St. Louis, MO (STL) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
O'Hare Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Return price
AU$169
Distance
413 km
Average flight time
1 hour 25 mins

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Your quick guide to flights from Chicago to St. Louis

Pick up great flights from Chicago to St. Louis

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Chicago to St. Louis. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Chicago to St. Louis that take around hours.

Find cheap flights from Chicago to St. Louis

From the great flight deals with prices currently ranging from AU$170 to AU$680, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Chicago to St. Louis around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to St. Louis is normally in August.

Reasons to book your flight from Chicago to St. Louis with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Chicago to St. Louis across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to St. Louis right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Chicago to St. Louis

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