Find flights
Deals
Insights
When to book
FAQs & Tips
Direct Flights
Airlines

ORD - STL

$46 Find cheap flights from Chicago O'Hare Intl Airport to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from O'Hare Intl to St. Louis departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 5/25
Sat 6/1

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 44,979,812 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from O'Hare Intl to St. Louis (ORD-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from O'Hare Intl to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:50 am - 11:10 amORD-STL
1h 20mnonstop
5:55 am - 7:11 amSTL-ORD
1h 16mnonstop
$107American Airlines
Find Deal
Wed, May 15 - Fri, May 17
9:25 pm - 11:45 amORD-STL
14h 20m1 stop
12:15 pm - 3:50 pmSTL-ORD
3h 35m1 stop
$128Southern / Mokulele
Find Deal
Tue, May 14 - Thu, May 16
8:15 am - 4:45 pmORD-STL
8h 30m1 stop
2:00 pm - 7:40 amSTL-ORD
17h 40m1 stop
$129Southern / Mokulele
Find Deal
Mon, May 13 - Thu, May 16
5:15 am - 9:53 amORD-STL
4h 38m1 stop
5:55 am - 7:11 amSTL-ORD
1h 16mnonstop
$140American Airlines
Find Deal
Wed, May 15 - Fri, May 17
5:23 pm - 9:34 pmORD-STL
4h 11m1 stop
6:11 am - 10:26 amSTL-ORD
4h 15m1 stop
$156Delta
Find Deal
Sat, May 25 - Sun, May 26
6:07 am - 11:10 amORD-STL
5h 03m1 stop
6:11 am - 12:42 pmSTL-ORD
6h 31m2 stops
$161Delta
Find Deal
Sat, May 25 - Sun, May 26
2:20 pm - 3:41 pmORD-STL
1h 21mnonstop
5:31 pm - 6:55 pmSTL-ORD
1h 24mnonstop
$165United Airlines
Find Deal
Sat, May 25 - Sun, May 26
6:40 pm - 6:40 pmORD-STL
24h 00m2 stops
2:35 pm - 10:14 amSTL-ORD
19h 39m2 stops
$207Spirit Airlines
Find Deal
Wed, May 8 - Tue, May 14
2:24 pm - 3:46 pmORD-STL
1h 22mnonstop
11:10 am - 12:31 pmSTL-ORD
1h 21mnonstop
$212United Airlines
Find Deal
Wed, May 15 - Thu, May 16
7:00 am - 5:29 pmORD-STL
34h 29m2 stops
7:30 pm - 4:35 pmSTL-ORD
21h 05m2 stops
$215Spirit Airlines
Find Deal
Wed, May 15 - Thu, May 16

Flights from O'Hare Intl to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from O'Hare Intl to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Chicago O'Hare Airport to St. Louis?

The average price of all flights from Chicago O'Hare Intl Airport to St. Louis clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to St. Louis on a Friday and more expensive on a Monday. On your return trip to Chicago O'Hare Airport, you should consider flying back on a Thursday, and avoid Mondays for better deals.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Chicago O'Hare Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Chicago O'Hare Intl Airport to St. Louis is September, where tickets cost $224 on average. On the other hand, the most expensive months are March and June, where the average cost of tickets is $342 and $337 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Chicago O'Hare Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Chicago O'Hare Intl Airport to St. Louis, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 38 days before departure.

Which airlines provide the cheapest flights from Chicago O'Hare Airport to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on United Airlines ($46) and American Airlines ($49). The cheapest round-trip tickets were found on American Airlines ($107) and Southern / Mokulele ($128).

Which airlines fly non-stop between Chicago O'Hare Intl Airport and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Chicago O'Hare Intl Airport to St. Louis.
There are 2 airlines that fly nonstop from Chicago O'Hare Intl Airport to St. Louis. They are American Airlines and United Airlines. The cheapest airline for this route is American Airlines, with the best one-way deal found costing $114. On average, the best prices for this route can be found at American Airlines.

How many flights are there between Chicago O'Hare Intl Airport and St. Louis per day?

Each day, there are between 14 and 20 nonstop flights that take off from Chicago O'Hare Intl Airport and land in St. Louis, with an average flight time of 1h 22m. The most common departure time is 3:00 pm and most flights take off in the morning. Each week, there are 121 flights. The most frequent day of departure is Friday, when 17% of all weekly flights depart. The fewest flights depart on a Monday.

Which cabin class options are there for flights between Chicago O'Hare Intl Airport and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Chicago O'Hare Airport to St. Louis take?

The average nonstop flight takes 1h 12m, covering a distance of 258 miles.

What’s the earliest departure time from Chicago O'Hare Airport to St. Louis?

Early birds can take the earliest flight from Chicago O'Hare Intl Airport at 7:59 am and will be landing in St. Louis at 9:19 am.

What’s the latest departure time from Chicago O'Hare Airport to St. Louis?

If you prefer to fly at night, the latest flight from Chicago O'Hare Intl Airport to St. Louis jets off at 8:24 pm and lands at 9:47 pm.

Good to know

Low season

January

High season

February

Cheapest flight

$46
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Chicago O'Hare Airport to St. Louis

When to book flights from O'Hare Intl to St. Louis

Are your dates flexible? Find out the best times to travel from O'Hare Intl to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Chicago O'Hare Airport to St. Louis flights

  • How can I travel sustainably from Chicago O'Hare International Airport to St. Louis?

    If you want to travel in an eco-friendly way, consider booking your flight with carriers serious about flight sustainability. Delta is vocal about its sustainability pledge to reduce its carbon emissions significantly. The airline is investing in offsetting its carbon, implementing clean air technology, and eliminating single-use plastic items. Keeping sustainable fleets is among its commendable initiatives.

  • How can I catch the first flight from Chicago O'Hare International Airport to St. Louis?

    The most convenient and sustainable way to catch your early morning flight, especially if you live far from ORD, is by booking a nearby hotel. Commuting in the morning amid traffic snarl-ups is worth avoiding. O’Hare Inn & Suites, Red Roof Inn Chicago, and Wyndham Chicago O’Hare offer great airport accessibility.

  • Do flights from Chicago O'Hare International Airport to St. Louis consider persons with limited mobility?

    Passengers with limited mobility are considered on this route. For instance, if you book your ticket with Spirit Airlines, remember to make a special arrangement request. The carrier is dedicated to providing accessible, seamless, and comfortable air trips to all its travelers, regardless of their circumstances. The airline has a competent staff to offer meet-and-assist services, wheelchair support, and in-flight services.

  • What are the best transportation options from Lambert-St Louis Airport to the city center?

    Multiple options exist when connecting from Lambert-St Louis (STL) to the city center. A train operates the route from the airport to Stadium Metrolink Station, taking about 35 minutes. Line Bus also operates the route, arriving downtown St. Louis in about 1 hour and 15 minutes. Taxis take about 20 minutes to arrive at the city center.

  • What is the cheapest flight from Chicago O'Hare Intl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to St. Louis was $46 for a one-way ticket and $107 for a round-trip.

  • Do I need a passport to fly between Chicago O'Hare Airport and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Chicago O'Hare Airport to St. Louis?

    American Airlines, Delta, JetBlue, and Alaska Airlines offer inflight Wi-Fi service on the Chicago O'Hare Airport to St. Louis flight route.

  • Which aircraft models fly most regularly from Chicago O'Hare Airport to St. Louis?

    The Airbus A319 is the aircraft model that flies most regularly on the Chicago O'Hare Airport to St. Louis flight route.

  • Which airline alliances offer flights from Chicago O'Hare Airport to St. Louis?

    oneworld, and Star Alliance are the airline alliances operating flights between Chicago O'Hare Airport and St. Louis, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from Chicago O'Hare Airport to St. Louis?

    There are nonstop flights from Chicago O'Hare Airport to St. Louis on a daily basis.

  • Which is the best airline for flights from Chicago to St. Louis, Southern / Mokulele or United Airlines?

    The two airlines most popular with KAYAK users for flights from Chicago to St. Louis are Southern / Mokulele and United Airlines. With an average price for the route of $166 and an overall rating of 8.3, Southern / Mokulele is the most popular choice. United Airlines is also a great choice for the route, with an average price of $298 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Chicago O'Hare Airport to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago O'Hare Airport to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago O'Hare Airport to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Chicago O'Hare Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago O'Hare Airport to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Chicago O'Hare Airport with another airline. Booking your flights between Chicago O'Hare Airport and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago O'Hare Airport to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from ORD to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $144 or less one-way and $236 or less round-trip.
  • Chicago O'Hare International Airport (ORD) is a central hub for air travel, and your flight will fly into Lambert-St. Louis Airport (STL). The airlines to expect on the route include Delta, Spirit Airlines, United Airlines, American Airlines, and Southern/Mokulele. These airlines operate various flight options.
  • When traveling from Chicago O'Hare International Airport (ORD) to St. Louis, the most popular locations for stopover flights include Quincy, Burlington, Detroit, Minneapolis, and Charlotte. The layover cities on this route vary depending on your airline and specific flight schedules.
  • Multiple airlines from Chicago O'Hare International Airport (ORD) to St Louis offer Business Class flights with common amenities and services, including comfortable seating, unlimited in-flight entertainment, improved dining options, access to selected lounges, and extra legroom.
  • Since STL is a hub for American Airlines, consider traveling with the airline to enjoy unlimited lounge amenities when you land. American Airlines Admirals Club treats its Business Class and First Class passengers to unlimited entertainment, shower options, complimentary snacks, food, and drinks. Digital magazines and business centers are also available at your convenience.
  • After landing at STL, you can visit several nearby cities and towns. The airport allows you to visit Saint Ann, Edmundson, Hazelwood, Bridgeton Terrace, Berkeley, Woodson Terrace, Schuermann Heights, and Robertson. The airport has an incredible transport network to help you get to these places by bus, taxi, or rental car.
See more tips

Prefer to fly non-stop from Chicago O'Hare Airport to St. Louis?

Find which airlines fly direct from O'Hare Intl to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Chicago O'Hare Intl to Lambert-St Louis

Monday

ANA, Aer Lingus, Air Canada, +14 more

ANA, Aer Lingus, +15 more

Tuesday

ANA, Aer Lingus, Air Canada, +16 more

ANA, Aer Lingus, +17 more

Wednesday

ANA, Aer Lingus, Air Canada, +17 more

ANA, Aer Lingus, +18 more

Thursday

ANA, Aer Lingus, Air Canada, +16 more

ANA, Aer Lingus, +17 more

Friday

ANA, Aer Lingus, Air Canada, +18 more

ANA, Aer Lingus, +19 more

Saturday

ANA, Aer Lingus, Air Canada, +17 more

ANA, Aer Lingus, +18 more

Sunday

ANA, Aer Lingus, Air Canada, +18 more

ANA, Aer Lingus, +19 more

See more direct flights

Nonstop returns

Lambert-St Louis to Chicago O'Hare Intl

Monday

ANA, Aer Lingus, Air Canada, +14 more

ANA, Aer Lingus, +15 more

Tuesday

ANA, Aer Lingus, Air Canada, +16 more

ANA, Aer Lingus, +17 more

Wednesday

ANA, Aer Lingus, Air Canada, +17 more

ANA, Aer Lingus, +18 more

Thursday

ANA, Aer Lingus, Air Canada, +16 more

ANA, Aer Lingus, +17 more

Friday

ANA, Aer Lingus, Air Canada, +18 more

ANA, Aer Lingus, +19 more

Saturday

ANA, Aer Lingus, Air Canada, +17 more

ANA, Aer Lingus, +18 more

Sunday

ANA, Aer Lingus, Air Canada, +18 more

ANA, Aer Lingus, +19 more

See more direct flights
See more direct flights

Top 3 airlines serving from O'Hare Intl to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Chicago to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from O'Hare Intl to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.3
Southern / MokuleleOverall score based on 24 reviews
7.2food
9.2crew
8.2entertainment
8.5boarding
8.4comfort
Airline reviews

Flight was cancelled twice. Moved four more times. Probably the least timely and poorly run airline I have ever experienced in my life. I have traveled hundreds of times to dozens of countries and this one takes the cake.

2.0 MediocrePaul, Apr 2024MKK - HNL
Read more about Southern / Mokulele reviews

Flight was cancelled twice. Moved four more times. Probably the least timely and poorly run airline I have ever experienced in my life. I have traveled hundreds of times to dozens of countries and this one takes the cake.

Excellent crew, good flight. Flight was delayed about 1 1/2 hours though.

Pros: "The ground crew and flight crew were great."
Cons: "Would have appreciated easier steps (lower risers) for boarding. Arthritic knee makes it hard for me to manage the high risers between steps. Also having armrests would have made the flight more comfortable."
Pros: "I loved the small craft and easy boarding."
Cons: "Flight is a little slower with a smaller plane, but that was expected."
Pros: "So fast and friendly crew. So much easier to fly to Morgantown, instead of driving. Plus the views from above are so great."
Cons: "Flight could not be better for a commuter connection."
Pros: "Awesome crew. Simple check-in and boarding. Beautiful, scenic views. A+!"

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

The flight experience was very good! Especially the United Club!

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

The flight from Ottawa to Chicago took a lot longer due to DC in Ottawa. We got to Chicago and went to our gate to catch our flight. We only had nine minutes I found that very stressful.

Good boarding. Crew started quick with drinks and food. They came around several times for trash which I really liked. Other than turbulence due to storms in the area, flight was great.

The control panel for the seat back screen did not work at all after takeoff.

Plane was so old it had cigarette butt trays in the seat

Everything was good, hard to really comfortable on a flight that long.

Unfortunately our flight was delayed by 45 minutes due to Kate arriving aircraft. Once we stated everything was great.

For some strange reason I was put in zone 5 for boarding even though I had paid premium price for a premium seat right behind business class. This must have been a flaw because everyone else around me in the same zone (row) had been placed in zone 3.

Good flights. Departure and arrivals were on time. DFW was a little problematic in that the Skytrain without prior notice bypassed the Echo terminal so that delayed my arrival at my connecting flight.

Because I can’t stand very long in one place, I was allowed to reword.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

Excellent- plan was barely populated. I cannot remember a flight where I was able/encouraged to stretch out!

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Had technical issue which delayed the flight period. Flight crew knew there was 5 passengers that the connecting flight was within 15 minutes once at the gate. Rather than identify the 5 passengers to assure they got first. The flight attended mentioned it but didn't assist to assure passengers with connecting flights off first. This caused a hardship and our party of 3 missed the connecting flight.

I don't like that I have to pay if I want extra leg room. The seats are so expensive; I sit in normal seats and my legs and knees cramp the entire flight. I never feel comfortable on AA flights.

I did like the employee's, they are very friendly and all smiled most of the time, Overall, from checking in bags to getting on plane, not enough employees to be able to get all on the plane, therefore I was not able to get on the plane, due to no one wea there for me to check in my bag, so I decided to go thru the security point and by the time they were done with my bags, I was told that my bag cannot be checked in, and then found out that the lady that does the check in was boarding the customers onto the plane, she said that she was going back and fourth, there for was not able to get on the plane, which changed all my flights by the time I got to Dallas, I was on standby 3 times, and wasn't sure about being able to get on the fourth plane, so ended up buying another plane ticket, so I could make my destination on time.

Not sure about entertainment as I didn't use any, so maybe there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

American Airlines “Randy” questioned why I needed preboarding and denied my request for same. Then Randy attempted to berate me when I boarded with my group. I was seated in an exit roll with a young man with a disability that exhibited difficulty controlling and settling himself. But Tandy questioned my disability. The flight was horrible. It was overpacked.

Book cheap flights from Chicago to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Chicago to St. Louis found on KAYAK in the last 72 hours.
5/26Sun
nonstopUnited Airlines
1h 21mORD-STL
$46
5/22Wed
nonstopAmerican Airlines
1h 20mORD-STL
$49
5/16Thu
nonstopAmerican Airlines
1h 13mORD-STL
$59
5/21Tue
1 stopSpirit Airlines
11h 54mORD-STL
$61
5/21Tue
2 stopsSpirit Airlines
27h 46mORD-STL
$62
5/9Thu
1 stopSouthern / Mokulele
8h 30mORD-STL
$69
5/2Thu
1 stopSouthern / Mokulele
8h 30mORD-STL
$70
9/25Wed
1 stopDelta
5h 40mORD-STL
$78
5/18Sat
nonstopUnited Airlines
1h 27mORD-STL
$89
8/3Sat
1 stopDelta
6h 57mORD-STL
$102

Search by stops

Search by airline

Search by price

Last minute flights from O'Hare Intl to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Chicago to St. Louis that are departing in the next 10 days.
4/30Tue
multi-stopSouthern / Mokulele
3h 05mORD-STL
5/3Fri
multi-stopSouthern / Mokulele
19h 40mSTL-ORD
$137
4/28Sun
multi-stopSouthern / Mokulele
19h 45mORD-STL
4/30Tue
multi-stopSouthern / Mokulele
19h 40mSTL-ORD
$160
4/30Tue
multi-stop
27h 40mORD-STL
5/3Fri
multi-stop
26h 10mSTL-ORD
$216
4/30Tue
multi-stop
20h 09mORD-STL
5/3Fri
multi-stop
19h 40mSTL-ORD
$251
4/30Tue
nonstopUnited Airlines
1h 29mORD-STL
5/9Thu
nonstopUnited Airlines
1h 31mSTL-ORD
$411
4/30Tue
multi-stopDelta
9h 32mORD-STL
5/9Thu
multi-stopDelta
4h 19mSTL-ORD
$425
4/30Tue
multi-stopAmerican Airlines
4h 43mORD-STL
5/9Thu
nonstopAmerican Airlines
1h 19mSTL-ORD
$433
4/27Sat
nonstopUnited Airlines
1h 29mORD-STL
4/29Mon
nonstopUnited Airlines
1h 26mSTL-ORD
$445
4/27Sat
nonstopAmerican Airlines
1h 15mORD-STL
4/29Mon
multi-stopAmerican Airlines
6h 29mSTL-ORD
$467
4/27Sat
multi-stopDelta
3h 57mORD-STL
4/28Sun
multi-stopDelta
6h 30mSTL-ORD
$469

Search by stops

Search by airline

Search by price

Chicago O'Hare Airport - St. Louis Flights

Departure:

Chicago O'Hare Airport (ORD)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Chicago O'Hare Airport

Cabin classes:

$490
$1,399
$407
$136