$49 Cheap Flights from Chicago (ORD) to St. Louis (STL)

Bundle Your Flight + Hotel & Save!

Featured airlines

Top nine airline logos for desktop

    Plan, book, fly with confidence
  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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

Prices were available within the past 7 days and start at $49 for one-way flights and $97 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Jul 1 - Tue, Jul 2
ORD
Chicago
STL
St. Louis
$97 Roundtrip, found 3 hours ago
$97
Roundtrip
found 3 hours ago
Select United flight, departing Mon, Jul 1 from Chicago to St. Louis, returning Tue, Jul 2, priced at $97 found 3 hours ago
American Airlines
Mon, Jul 1 - Tue, Jul 2
ORD
Chicago
STL
St. Louis
$97 Roundtrip, found 3 hours ago
$97
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Mon, Jul 1 from Chicago to St. Louis, returning Tue, Jul 2, priced at $97 found 3 hours ago
American Airlines
Mon, Jul 1 - Tue, Jul 2
ORD
Chicago
STL
St. Louis
$98 Roundtrip, found 3 hours ago
$98
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Mon, Jul 1 from Chicago to St. Louis, returning Tue, Jul 2, priced at $98 found 3 hours ago
United
Fri, May 31 - Mon, Jun 3
ORD
Chicago
STL
St. Louis
$107 Roundtrip, found 4 hours ago
$107
Roundtrip
found 4 hours ago
Select United flight, departing Fri, May 31 from Chicago to St. Louis, returning Mon, Jun 3, priced at $107 found 4 hours ago
American Airlines
Thu, May 30 - Thu, Jun 6
ORD
Chicago
STL
St. Louis
$107 Roundtrip, just found
$107
Roundtrip
just found
Select American Airlines flight, departing Thu, May 30 from Chicago to St. Louis, returning Thu, Jun 6, priced at $107 just found
United
Thu, May 30 - Thu, Jun 6
ORD
Chicago
STL
St. Louis
$108 Roundtrip, just found
$108
Roundtrip
just found
Select United flight, departing Thu, May 30 from Chicago to St. Louis, returning Thu, Jun 6, priced at $108 just found
United
Thu, May 30 - Fri, May 31
ORD
Chicago
STL
St. Louis
$110 Roundtrip, found 1 hour ago
$110
Roundtrip
found 1 hour ago
Select United flight, departing Thu, May 30 from Chicago to St. Louis, returning Fri, May 31, priced at $110 found 1 hour ago
American Airlines
Thu, May 30 - Fri, May 31
ORD
Chicago
STL
St. Louis
$111 Roundtrip, found 1 hour ago
$111
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Thu, May 30 from Chicago to St. Louis, returning Fri, May 31, priced at $111 found 1 hour ago
United
Mon, Jul 1 - Tue, Jul 2
ORD
Chicago
STL
St. Louis
$113 Roundtrip, found 3 hours ago
$113
Roundtrip
found 3 hours ago
Select United flight, departing Mon, Jul 1 from Chicago to St. Louis, returning Tue, Jul 2, priced at $113 found 3 hours ago
United
Mon, Jul 1 - Tue, Jul 2
ORD
Chicago
STL
St. Louis
$115 Roundtrip, found 3 hours ago
$115
Roundtrip
found 3 hours ago
Select United flight, departing Mon, Jul 1 from Chicago to St. Louis, returning Tue, Jul 2, priced at $115 found 3 hours ago
Flights from Chicago (ORD) to St. Louis (STL)
Origin airport
O'Hare Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southern Airways Express, United
Roundtrip price
$96
Distance
258 mi
Average flight time
1 hour 20 mins

Chicago to St. Louis Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Chicago to St. Louis offer the perfect respite. Not only does exploring St. Louis provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Chicago to St. Louis may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from ORD to STL today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of St. Louis are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to St. Louis more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to St. Louis is $49 now!

Frequently asked questions

How much is a one-way flight from O'Hare Airport to Lambert Field?
Get ready to grab a bargain, because one-way Chicago flights to St. Louis start from only $49. This information is based on the best price found on Expedia for this journey with a departure date within the next three months. This airfare is for an American Airlines flight, jetting off from ORD on July 5 2024 and landing at Lambert-St. Louis Intl. Airport (STL). The price was updated on May 7 2024 and has not changed since.
How long does it take to fly from ORD to St. Louis Lambert International Airport?
A direct flight with United Airlines takes approximately 1 hour and 12 minutes. Hop on the 7:10AM flight from O’Hare Intl. Airport (ORD) and come in to land at Lambert Field at 8:22AM. Snap up a great deal on this and many other routes when you use Expedia to book your journey.
Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to St. Louis Lambert International Airport last minute?
When it comes to booking your flights, it pays to be prepared. While you may be able to find a deal on an ORD to Lambert Field flight at the last minute, tickets usually don’t get cheaper as the date of departure nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days in advance. For international travel it’s three to four months.
What is the cheapest airline flying from O'Hare Intl. Airport (ORD) to Lambert Field in the next 90 days?
The cheapest carrier traveling from Chicago to St. Louis found on Expedia is American Airlines, which has fares starting from $49. This price is based on fares found on Expedia with a departure date within the next 90 days. The flight departs O’Hare Intl. Airport (ORD) on July 5 2024 and arrives at Lambert-St. Louis Intl. Airport (STL). Pricing information was updated on May 7 2024 and has not changed since.
What's the cheapest price for a flight from ORD to STL next month?
You can pick up a one-way flight from Chicago to St. Louis for $49. This is the cheapest ticket price for this route with a departure date in the next month. It’s an United flight heading off from O’Hare Intl. Airport (ORD) on May 30 2024 and touching down at STL. The pricing information was accurate as of May 7 2024 and has not changed since. It was found after searching all available flights on Expedia within the next 30 days.
What airline has the least delays from O'Hare Intl. Airport (ORD) to Lambert-St. Louis Intl. Airport (STL)?
If you’d rather not be stuck at your gate for hours — or worse, have your vacation plans ruined due to a flight delay — pick United Airlines. Around 84% of its ORD to STL services land on time. You can check your flight status before making your way to the airport through the free Expedia App. It’ll also give you real-time notifications about other helpful info, such as gate number changes and directions to your hotel. You’ll have all the details in your pocket with our handy travel companion.
Can I find cheap nonstop flights from O'Hare Intl. Airport (ORD) to STL in the next three months?
The cheapest fare we’ve found for a roundtrip nonstop flight from Chicago to St. Louis in the next 90 days is $97. This amount is based on all available flights on Expedia with a departure date in the next three months. This airfare is for a flight via American Airlines departing from O’Hare Intl. Airport (ORD) on May 30 2024 and arriving at STL, with a return flight on May 30 2024. This price was updated on May 7 2024.It’s easy to locate nonstop cheap flights from O’Hare Airport to Lambert Field by using our filters. Start by searching for your trip, then press on “Nonstop” under “Filter by” on the left side of the page. Your results will be arranged with the cheapest airfare first. If you don’t need to leave on a set day, use our handy “Flexible dates” feature. This lets you compare prices for nearby dates and pick up the best possible deal.
What airports do you fly into for Central United States from Chicago?
To travel from Chicago to Central United States, you can arrive at Lambert-St. Louis Intl. Airport (STL), Spirit of St. Louis Airport (SUS) or St. Louis Downtown Airport (CPS). Hop off the plane at Lambert-St. Louis Intl. Airport (STL) and you’ll be about 180 mi east of the heart of Central United States. Whichever terminal you go for, Expedia will help you find a terrific flight deal.
What are the most popular departure times for flights from O'Hare Intl. Airport (ORD) to St. Louis Lambert International Airport?
Between 10:00 AM - 11:00 AM is the busiest time for United Airlines flights jetting from O’Hare Airport to St. Louis Lambert International Airport. Our advice? Take off earlier in the day. With air traffic yet to build up around airports, your chances of traveling on a delay-free flight are higher.
Can I change the date of my flight from O'Hare Intl. Airport (ORD) to Lambert-St. Louis Intl. Airport (STL)?
Quickly make changes to your O’Hare Airport to St. Louis Lambert International Airport ticket through the Expedia Trips portal. But before amending dates or times, read the fare rules in your itinerary to see what the airline will let you do and what charges may apply. Some airlines charge a change fee per person, plus any difference in fare prices. However, if you booked in the last 24 hours, you may be able to cancel for free and organize new flights. You can also swing by our Customer Service portal for more advice and to connect with our Virtual Agent.
Chicago nearby Airports

Chicago

Midway Intl. to St. Louis
$133.95
*Available to One Key members.