$69 Cheap Flights from St. Louis (STL) to Chicago (ORD)

View $69 flight on Tue, Jul 14, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $69 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Jun 16 - Wed, Jun 17
STL
St. Louis
ORD
Chicago
$137 Roundtrip, found 11 hours ago
$137
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Jun 16 from St. Louis to Chicago, returning Wed, Jun 17, priced at $137 found 11 hours ago
United
Tue, Jun 16 - Wed, Jun 17
STL
St. Louis
ORD
Chicago
$137 Roundtrip, found 11 hours ago
$137
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Jun 16 from St. Louis to Chicago, returning Wed, Jun 17, priced at $137 found 11 hours ago
Delta
Tue, Jun 16 - Wed, Jun 17
STL
St. Louis
ORD
Chicago
$147 Roundtrip, found 11 hours ago
$147
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Jun 16 from St. Louis to Chicago, returning Wed, Jun 17, priced at $147 found 11 hours ago
United
Wed, Jun 17 - Tue, Jul 7
STL
St. Louis
ORD
Chicago
$152 Roundtrip, found 14 hours ago
$152
Roundtrip
found 14 hours ago
Select United flight, departing Wed, Jun 17 from St. Louis to Chicago, returning Tue, Jul 7, priced at $152 found 14 hours ago
United
Tue, Jun 9 - Wed, Jun 10
STL
St. Louis
ORD
Chicago
$153 Roundtrip, found 1 day ago
$153
Roundtrip
found 1 day ago
Select United flight, departing Tue, Jun 9 from St. Louis to Chicago, returning Wed, Jun 10, priced at $153 found 1 day ago
United
Tue, Jun 23 - Wed, Jun 24
STL
St. Louis
ORD
Chicago
$157 Roundtrip, found 15 hours ago
$157
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Jun 23 from St. Louis to Chicago, returning Wed, Jun 24, priced at $157 found 15 hours ago
Delta
Tue, Jun 16 - Wed, Jun 17
STL
St. Louis
ORD
Chicago
$157 Roundtrip, found 11 hours ago
$157
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Jun 16 from St. Louis to Chicago, returning Wed, Jun 17, priced at $157 found 11 hours ago
United
Tue, Jun 16 - Wed, Jun 17
STL
St. Louis
ORD
Chicago
$159 Roundtrip, found 11 hours ago
$159
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Jun 16 from St. Louis to Chicago, returning Wed, Jun 17, priced at $159 found 11 hours ago
Frontier Airlines
Wed, Sep 23 - Wed, Oct 14
STL
St. Louis
ORD
Chicago
$190 Roundtrip, found 5 hours ago
$190
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Wed, Sep 23 from St. Louis to Chicago, returning Wed, Oct 14, priced at $190 found 5 hours ago
Southwest Airlines
Wed, May 27 - Sun, May 31
STL
St. Louis
ORD
Chicago
$569 Roundtrip, just found
$569
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, May 27 from St. Louis to Chicago, returning Sun, May 31, priced at $569 just found

Alternative airports near Chicago

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Midway Intl. MDW. Closest option available. Average driving time to city center is 16 minutes. Flights from $399
MDW
Midway Intl.
Closest
Average driving time to city center16 min
Flights from $399

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) cost?
You can find cheap one-way flights from $69 and cheap return flights from $137 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) with Expedia. One-way flights usually range from $85 to $628, and return flights typically cost between $205 and $838. 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 the cheapest fares first, and use the Price Tracking tool to receive alerts when St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
September is the cheapest month to fly from St. Louis to Chicago, with average return fares around $198. This is about 27% lower than the average price throughout the year, as demand tends to drop after the summer travel season. Other budget-friendly months include March and August.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
3 airlines operate nonstop service from STL to ORD:

  • United operates around 98 direct flights from STL to ORD every week
  • American Airlines operates around 68 direct flights from STL to ORD every week
  • British Airways operates around 18 direct flights from STL to ORD every week

What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
Southern Airways Express is one of the cheapest airlines offering connecting flights from St. Louis, MO (STL) to Chicago, IL (ORD) starting from around $267. 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.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.), 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
The best airline to fly with from St. Louis, MO (STL) to Chicago, IL (ORD) 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 STL to ORD, 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
The best times to fly from St. Louis, MO (STL) to Chicago, IL (ORD) are September and March. In September, you can find return flights for about $198, making it an economical choice. March also offers similar pricing, and both months are popular for travel, ensuring you have plenty of options for your trip.*Prices based on flights available on Expedia in the last year.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
You can find approximately 24 nonstop flights per day from Lambert-St. Louis Intl. (STL) to O'Hare Intl. (ORD). For more options, look at flights that include layovers.
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
The earliest flight from Lambert-St. Louis International Airport (STL) to O'Hare International Airport (ORD) usually departs at around 5:00 AM, operated by American Airlines. This is a seasonal service active in May and June, which can help you get an early start on your day in Chicago. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
The most popular departure times for flights from St. Louis (STL) to Chicago (ORD) are in the early morning, from 6am to 9am. About 30% of passengers prefer this time window. Many major carriers, including Delta, American Airlines, and United, offer flights during this period. This timing works well because it allows you to arrive in Chicago early and make the most of your day.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
A nonstop flight from STL to ORD typically takes around 1 hour 30 minutes, covering approximately 258 miles. Connecting flights on this route usually add 4 hours 30 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
First class seats are offered on the STL to ORD route. First class cabins are available on:

  • American Airlines
  • United Airlines
  • Delta Air Lines

How much is a business class flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
A direct, return business class ticket from St. Louis, MO (STL) to Chicago, IL (ORD) typically costs between $614 - $818. A non-stop, one-way business class flight is usually around $347 - $515. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) 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 Chicago from Lambert-St. Louis Intl. (STL)?
When traveling from Lambert-St. Louis Intl. (STL) to Chicago, you can fly into O'Hare Intl. (ORD) and Midway Intl. (MDW). Some flights may connect through major hubs like Clinton National Airport (LIT), Tulsa Intl. (TUL), Eppley Field (OMA) before reaching Chicago. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) Chicago Vacation Packages 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) 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
Lambert-St. Louis Intl.
Destination airport
O'Hare Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$137
Distance
258 mi
Average flight time
1 hour 27 mins

Book with confidence

St. Louis to Chicago Flights

The cheapest times to fly from St. Louis to Chicago

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Chicago are during the month of June. You can find some of the cheapest flights from St. Louis to Chicago with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Chicago

Sunday is one of the best days to book for cheap flights from St. Louis to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Chicago

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Chicago in 2026. You can also book with separate airlines for your outbound and return journeys, from $69 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Chicago Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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