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

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.

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.

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.

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.

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.

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.

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.

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).

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.

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.

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.

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.

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

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.

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.

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.

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.

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.