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

View AU$84 flight on Sat, 5 Sept 2026Opens in a new window

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

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

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
Sat, 5 Sept - Sun, 6 Sept
STL
St. Louis
ORD
Chicago
AU$167 Return, found 5 days ago
AU$167
Return
found 5 days ago
Select American Airlines flight, departing Sat, 5 Sept from St. Louis to Chicago, returning Sun, 6 Sept, priced at AU$167 found 5 days ago
American Airlines
Thu, 17 Sept - Thu, 24 Sept
STL
St. Louis
ORD
Chicago
AU$167 Return, found 9 hours ago
AU$167
Return
found 9 hours ago
Select American Airlines flight, departing Thu, 17 Sept from St. Louis to Chicago, returning Thu, 24 Sept, priced at AU$167 found 9 hours ago
American Airlines
Mon, 7 Sept - Fri, 11 Sept
STL
St. Louis
ORD
Chicago
AU$191 Return, found 1 day ago
AU$191
Return
found 1 day ago
Select American Airlines flight, departing Mon, 7 Sept from St. Louis to Chicago, returning Fri, 11 Sept, priced at AU$191 found 1 day ago
Delta
Sat, 5 Sept - Sun, 6 Sept
STL
St. Louis
ORD
Chicago
AU$223 Return, found 5 days ago
AU$223
Return
found 5 days ago
Select Delta flight, departing Sat, 5 Sept from St. Louis to Chicago, returning Sun, 6 Sept, priced at AU$223 found 5 days ago
Delta
Mon, 7 Sept - Fri, 11 Sept
STL
St. Louis
ORD
Chicago
AU$233 Return, found 1 day ago
AU$233
Return
found 1 day ago
Select Delta flight, departing Mon, 7 Sept from St. Louis to Chicago, returning Fri, 11 Sept, priced at AU$233 found 1 day ago
Delta
Sat, 5 Sept - Sun, 6 Sept
STL
St. Louis
ORD
Chicago
AU$244 Return, found 5 days ago
AU$244
Return
found 5 days ago
Select Delta flight, departing Sat, 5 Sept from St. Louis to Chicago, returning Sun, 6 Sept, priced at AU$244 found 5 days ago
United
Mon, 7 Sept - Fri, 11 Sept
STL
St. Louis
ORD
Chicago
AU$255 Return, found 1 day ago
AU$255
Return
found 1 day ago
Select United flight, departing Mon, 7 Sept from St. Louis to Chicago, returning Fri, 11 Sept, priced at AU$255 found 1 day ago
United
Sat, 5 Sept - Sun, 6 Sept
STL
St. Louis
ORD
Chicago
AU$266 Return, found 5 days ago
AU$266
Return
found 5 days ago
Select United flight, departing Sat, 5 Sept from St. Louis to Chicago, returning Sun, 6 Sept, priced at AU$266 found 5 days ago
American Airlines
Thu, 17 Sept - Thu, 24 Sept
STL
St. Louis
ORD
Chicago
AU$266 Return, found 9 hours ago
AU$266
Return
found 9 hours ago
Select American Airlines flight, departing Thu, 17 Sept from St. Louis to Chicago, returning Thu, 24 Sept, priced at AU$266 found 9 hours ago
Delta
Mon, 7 Sept - Fri, 11 Sept
STL
St. Louis
ORD
Chicago
AU$269 Return, found 1 day ago
AU$269
Return
found 1 day ago
Select Delta flight, departing Mon, 7 Sept from St. Louis to Chicago, returning Fri, 11 Sept, priced at AU$269 found 1 day ago

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 one-way and return flights from STL to ORD 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 STL to ORD ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL) to Chicago, IL (ORD)?
The cheapest months to fly from St. Louis, MO (STL) to Chicago, IL (ORD) 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
Five airlines offer direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.). Here are the top carriers:
  • United operates 109 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) every week.
  • American Airlines operates 52 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) every week.
  • British Airways operates 21 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) every week.
  • Finnair operates 7 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) every week.
  • Japan Airlines operates 7 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) every week.
How do I find cheap flights from St. Louis, MO (STL) to Chicago, IL (ORD)?
To find a cheap flight from St. Louis, MO (STL) to Chicago, IL (ORD), 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-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
The best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) is typically September. This month offers a great balance—prices are reasonable at around AU$295 for a return flight, and you'll have plenty of flight options since it's a popular time to travel. If you're flexible, September gives you both affordable fares and excellent flight schedules to work with.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
You'll find approximately 23 nonstop flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.). For even more choices, look at flights that include layovers, as there are around 55 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) typically departs around 5:00 AM local time. This flight is operated by American Airlines. This is a seasonal service, active in June. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
You'll find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) on Fridays, with around 51 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Delta, and Southwest Airlines. Flight schedules are fairly consistent throughout the week, with Fridays offering only slightly more options than other days.
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, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) are in the morning, from 6am to 9am. Many major carriers, including American Airlines, Delta and United, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to start 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.) typically takes around 1 hour 30 minutes. This route covers a distance of approximately 415 kilometers. If you opt for a flight with one stop, your travel time will be longer, usually around 6 hours 48 minutes. Flights with two or more stops can take even longer, often around 7 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to factor in some extra time when planning your trip.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Chicago, IL (ORD-O'Hare Intl.)?
You can fly business class or first class between STL and ORD. Airlines that offer business class service on this route include:
  • Delta
  • Frontier Airlines
First class cabins are available on:
  • Delta
  • American Airlines
  • United
  • Alaska Airlines
How do I earn miles on a St. Louis, MO (STL) to Chicago, IL (ORD) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL) to Chicago, IL (ORD) 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, IL (ORD) from St. Louis, MO (STL)?
If you're planning to travel to Chicago from Lambert-St. Louis Intl. (STL), you can fly directly into O'Hare Intl. (ORD). Some flights may connect through major hubs like Clinton National Airport (LIT), Eppley Field (OMA), or Tulsa Intl. (TUL) 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) to Chicago, IL (ORD) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL) to Chicago, IL (ORD) 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) to Chicago, IL (ORD) flight and hotel package?
Securing a St. Louis, MO (STL) to Chicago, IL (ORD) 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 St. Louis, MO (STL) to Chicago, IL (ORD)?
If you booked your St. Louis, MO (STL) to Chicago, IL (ORD) 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
American Airlines, Delta, United
Roundtrip price
AU$166
Distance
413 km
Average flight time
1 hour 32 mins

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Your quick guide to flights from St. Louis to Chicago

Pick up great flights from St. Louis to Chicago

With Expedia, you have your pick of flights a day with 20 airlines covering flights from St. Louis to Chicago. 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 St. Louis to Chicago that take around hours.

Find cheap flights from St. Louis to Chicago

From the great flight deals with prices currently ranging from AU$167 to AU$269, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from St. Louis to Chicago 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 Chicago is normally in September.

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

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