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STL - ORD

$49 Find cheap flights from St. Louis to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to O'Hare Intl 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
Mon 6/3
Mon 6/10

Search hundreds of travel sites at once for deals on flights to Chicago O'Hare Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Chicago, 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 St. Louis to Chicago, as well as popular online travel agencies
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

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

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

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to O'Hare Intl 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
5:08 pm - 6:25 pmSTL-ORD
1h 17mnonstop
3:04 pm - 4:17 pmORD-STL
1h 13mnonstop
$97American Airlines
Find Deal
Thu, May 30 - Fri, May 31
6:04 am - 7:25 amSTL-ORD
1h 21mnonstop
2:13 pm - 3:33 pmORD-STL
1h 20mnonstop
$107American Airlines
Find Deal
Wed, Jul 17 - Sat, Aug 17
5:31 pm - 6:55 pmSTL-ORD
1h 24mnonstop
2:20 pm - 3:41 pmORD-STL
1h 21mnonstop
$117United Airlines
Find Deal
Sat, May 25 - Sat, Jun 1
10:15 am - 11:49 amSTL-ORD
1h 34mnonstop
2:20 pm - 3:41 pmORD-STL
1h 21mnonstop
$127United Airlines
Find Deal
Wed, Jun 12 - Wed, Jun 19
11:36 am - 9:55 pmSTL-ORD
10h 19m1 stop
10:52 pm - 1:05 pmORD-STL
14h 13m1 stop
$154Spirit Airlines
Find Deal
Wed, May 29 - Tue, Jun 4
2:16 pm - 8:58 pmSTL-ORD
6h 42m1 stop
7:05 am - 12:01 pmORD-STL
4h 56m1 stop
$156Delta
Find Deal
Wed, Jun 12 - Wed, Jun 19
12:45 pm - 7:25 amSTL-ORD
18h 40m1 stop
12:30 pm - 8:20 pmORD-STL
7h 50m1 stop
$170Southern / Mokulele
Find Deal
Wed, Jun 12 - Thu, Jun 13
5:15 pm - 9:55 amSTL-ORD
16h 40m1 stop
7:12 am - 4:25 pmORD-STL
9h 13m1 stop
$171Spirit Airlines
Find Deal
Sat, May 25 - Sat, Jun 1
3:55 pm - 7:10 pmSTL-ORD
3h 15m1 stop
7:05 am - 1:00 pmORD-STL
5h 55m1 stop
$174Southern / Mokulele
Find Deal
Mon, May 20 - Thu, Jun 6
6:11 am - 12:42 pmSTL-ORD
6h 31m2 stops
5:40 am - 11:48 amORD-STL
6h 08m1 stop
$242Delta
Find Deal
Sun, May 26 - Mon, Jun 3

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

Get data-powered insights and trends into flights from St. Louis to O'Hare Intl 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 St. Louis to Chicago O'Hare Airport?

The average price of all flights from St. Louis to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.
For St. Louis to Chicago O'Hare Airport, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Chicago O'Hare Airport back to St. Louis, the best deals are generally found on Wednesday, with Tuesday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Chicago O'Hare Intl Airport, 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 St. Louis to Chicago O'Hare Intl Airport is January, where tickets cost $245 on average. On the other hand, the most expensive months are March and July, where the average cost of tickets is $352 and $314 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Chicago O'Hare Intl Airport, 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 St. Louis to Chicago O'Hare Intl Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 64 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from St. Louis to Chicago O'Hare Airport found by KAYAK users in the last 72 hours was for $97 on American Airlines, followed by United Airlines ($117). One-way flight deals have also been found from as low as $49 on American Airlines and from $59 on Frontier.

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

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from St. Louis to Chicago O'Hare Intl Airport.
There are 2 airlines that fly nonstop from St. Louis to Chicago O'Hare Intl Airport. They are American Airlines and United Airlines. The cheapest airline for this route is American Airlines, with the best one-way deal found costing $128. On average, the best prices for this route can be found at American Airlines.

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

Each day, there are between 15 and 19 nonstop flights that take off from St. Louis and land in Chicago O'Hare Intl Airport, with an average flight time of 1h 23m. The most common departure time is 5:00 pm and most flights take off in the morning. Each week, there are 121 flights. The most frequent day of departure is Thursday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.

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

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 St. Louis to Chicago O'Hare Airport take?

The duration of a nonstop flight to Chicago O'Hare Airport from St. Louis is typically 1h 16m. The journey crosses a distance of 258 miles.

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

Early birds can take the earliest flight from St. Louis at 5:55 am and will be landing in Chicago O'Hare Intl Airport at 7:11 am.

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

If you prefer to fly at night, the latest flight from St. Louis to Chicago O'Hare Intl Airport jets off at 6:30 pm and lands at 7:53 pm.

Good to know

Low season

July

High season

September

Cheapest flight

$49
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from St. Louis to Chicago O'Hare Airport

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

Are your dates flexible? Find out the best times to travel from St. Louis to O'Hare Intl 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 St. Louis to Chicago O'Hare Airport flights

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

    In the last 3 days, the lowest price for a flight from St. Louis to Chicago O'Hare Intl Airport was $49 for a one-way ticket and $97 for a round-trip.

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

    No

  • Which airports will I be using when flying from St. Louis to Chicago O'Hare Airport?

    St. Louis and Chicago O'Hare Airport are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Chicago O'Hare Intl.

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

    All the following airlines offer inflight Wi-Fi service on the St. Louis to Chicago O'Hare Airport flight route: American Airlines, Delta, Alaska Airlines, Lufthansa, United Airlines, Air Canada, and SWISS.

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

    The Boeing 737-800 is the aircraft model that flies most regularly on the St. Louis to Chicago O'Hare Airport flight route.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Chicago are Southern / Mokulele and United Airlines. With an average price for the route of $171 and an overall rating of 8.1, Southern / Mokulele is the most popular choice. United Airlines is also a great choice for the route, with an average price of $297 and an overall rating of 7.3.

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

    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 St. Louis to Chicago O'Hare Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from St. Louis 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 St. Louis to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and ORD 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 St. Louis to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport from St. Louis 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 STL to Chicago O'Hare Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $215 or less one-way and $608 or less round-trip.

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

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

Nonstop departures

Lambert-St Louis to Chicago O'Hare Intl

Monday

ANA, Aer Lingus, Air Canada, +15 more

ANA, Aer Lingus, +16 more

Tuesday

ANA, Aer Lingus, Air Canada, +17 more

ANA, Aer Lingus, +18 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

Chicago O'Hare Intl to Lambert-St Louis

Monday

ANA, Aer Lingus, Air Canada, +15 more

ANA, Aer Lingus, +16 more

Tuesday

ANA, Aer Lingus, Air Canada, +17 more

ANA, Aer Lingus, +18 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 St. Louis to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Chicago. 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 St. Louis to O'Hare Intl? 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.
8.1
Southern / MokuleleOverall score based on 25 reviews
8.1Comfort
7.9Entertainment
8.9Crew
8.3Boarding
6.9Food
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+!"

I was told we'd have a hot breakfast option in first class, so I chose not get a hot breakfast. It was a very strange meal, but the fresh fruit was very good quality. Service was excellent from ORD to ELP. No service from MBS to ORD, not even water. However, when flying American from FNT to ORD, which is a shorter flight, they at least pass out snacks and offer water.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

The flight was delayed instead of leaving at 11 it left at 12.20

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Good movies, iffy pay WiFi, food ok- on time though and that was great!

Awful…flight was delayed more than 12hrs, missed all connections to Fort Wayne, IN, had to get flight to another city 2 hours from my destination, flight was again delayed by 40 mins because they did not have enough fuel, again missed a connection, finally arrived in Indiana at 11pm…but before my 2 hour drive home, ay, no Five That Our Luggage Never Made On The plane and Still In Chicago

Boarding was friendly and quick. While the plane model was older with no live tv, the entertainment was full of movies and tv shows. All food was available. Pilots were very communicative with status of the flight. Flight landed on time.

The Palm Springs to Chicago O’Hare was on Time and Palm Springs airport is easier navigate. As our connection was only an approximately 50 minutes, we asked staff for insights for the Chicago airport in terms of transferring into the other terminal from which our flight left, and they were unhelpful. However, the United App was very helpful in terms of notifications and even providing directions. The Chicago to Detroit flight was significantly delayed which we all know does happen. However, there were very few updates or notifications as to why this was happening when we would actually arrive. It took nearly 30 minutes for bags to make it to baggage claim. We arrived nearly 1 hour late on a 40 minute flight.

Flight cancelled due to fog. No other flights available for 36 hours. Directed by United to book passage on another carrier, and submit receipts for reimbursement. Did that. United now states they will not reimburse. Currently out 2 grand.

The flight was delayed by 4 hours !!!!! It was very uncomfortable , and they told us only one our before departure

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

Flight was fine. It took an unusually long time to have baggage delivered to the carousel in ORD.

Average - flew with Jet Blue internal and it was far more comfortable and better food and entertainment. Notable difference

The flight got canceled due to mechanical issues, and he to be rebooked and missed my appointments for that day

The flight was scheduled to depart DCA at 12:30 pm but was delayed twice on the ground so that we were finally scheduled to depart at around 4:00 pm. Once we boarded, it was announced that takeoff would be delayed again to fix a hydraulic problem which delayed our eventual takeoff until around 5:00 pm. Once we departed, it was a smooth flight back to ORD. We did not get any explanation about what caused the original significant delay. In my experience, this happens frequently with AA.

The only problem experienced was a ground stop in Chicago due to weather. But the crew handled everything professionally. They prioritized rebooking those passengers who had connecting flights and then deplaning the other passengers. When the hold was lifted, they efficiently re-boarded all the passengers so that we could depart before our departure limit expired.

Our second leg to Jackson WY was unable to land due to weather. We were flown back to Dallas after stopping in SLC. We were given hotel rooms and vouchers. We were told that we would be back on the same plane in the morning. Instead we were given a different flight with different seats. Not a good experience. No one knew what was going on.

Turn on the heat. Flight was way too cold from Arizona to Chicago.

Book cheap flights from St. Louis to Chicago

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Chicago found on KAYAK in the last 72 hours.
5/26Sun
nonstopAmerican Airlines
1h 16mSTL-ORD
$49
5/17Fri
1 stopFrontier
10h 30mSTL-ORD
$59
5/29Wed
1 stopDelta
6h 37mSTL-ORD
$78
5/18Sat
2 stopsSpirit Airlines
13h 39mSTL-ORD
$81
6/22Sat
1 stopSouthern / Mokulele
21h 50mSTL-ORD
$82
6/27Thu
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$83
5/21Tue
1 stopSpirit Airlines
12h 55mSTL-ORD
$90
6/2Sun
nonstopUnited Airlines
1h 24mSTL-ORD
$224
6/3Mon
1 stopDelta
4h 44mSTL-ORD
$249
5/12Sun
nonstopUnited Airlines
1h 20mSTL-ORD
$261

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

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 St. Louis to Chicago that are departing in the next 10 days.
5/8Wed
multi-stopSouthern / Mokulele
21h 50mSTL-ORD
5/9Thu
multi-stopSouthern / Mokulele
3h 05mORD-STL
$185
5/7Tue
multi-stopSouthern / Mokulele
7h 05mSTL-ORD
5/8Wed
multi-stopSouthern / Mokulele
18h 30mORD-STL
$186
5/8Wed
multi-stopSouthern / Mokulele
7h 05mSTL-ORD
5/8Wed
multi-stopSouthern / Mokulele
19h 20mORD-STL
$190
5/8Wed
multi-stop
24h 18mSTL-ORD
5/9Thu
multi-stop
11h 15mORD-STL
$339
5/8Wed
multi-stop
7h 05mSTL-ORD
5/8Wed
multi-stop
15h 25mORD-STL
$358
5/8Wed
nonstopAmerican Airlines
1h 19mSTL-ORD
5/8Wed
nonstopAmerican Airlines
1h 26mORD-STL
$437
5/8Wed
nonstopAmerican Airlines
1h 19mSTL-ORD
5/8Wed
multi-stopAmerican Airlines
5h 50mORD-STL
$445
5/7Tue
multi-stopDelta
6h 31mSTL-ORD
5/23Thu
multi-stopDelta
5h 03mORD-STL
$572
5/4Sat
nonstopUnited Airlines
1h 26mSTL-ORD
5/4Sat
nonstopUnited Airlines
1h 29mORD-STL
$607
5/7Tue
nonstopUnited Airlines
1h 20mSTL-ORD
5/8Wed
nonstopUnited Airlines
1h 29mORD-STL
$613

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St. Louis - Chicago O'Hare Airport Flights

Departure:

St. Louis (STL)United States

Destination:

Chicago O'Hare Airport (ORD)United States

Return flight deals:

Chicago O'Hare Airport - St. Louis

Cabin classes:

$554
$393
$1,760
$268