$49 Find Cheap Flights from Missouri to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Missouri to Illinois departing on 3/14. 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.
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Good to know

Low season

January

High season

August

Cheapest flight

$49
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from St. Louis to Chicago O'Hare Airport

Flights from Missouri to Illinois: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Missouri to Illinois 
valerieFlew with Air CanadaSTL-ORDJan 2025
Usually it is unreliable - always leave lots of time for connection.
Verified travelerFlew with American AirlinesSTL-ORDMay 2024
The flight from STL to Chicago was good

FAQs for booking flights from Missouri to Illinois

  • How does KAYAK find such low prices on flights from Missouri to Illinois?

    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 Missouri to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Missouri to Illinois 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 Missouri to Illinois?

    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 from Missouri to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Illinois?

    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 from Missouri to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Missouri to Illinois

Need help choosing which airline to fly with from Missouri to Illinois? 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
SouthwestOverall score based on 4587 reviews
8.2Boarding
7.1Food
8.1Comfort
7.7Entertainment
8.7Crew
Airline reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

10.0 ExcellentAnonymous, Jan 2025ATL - LGA
Read more Southwest reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Flight was awfully bumpy and landing was a bit jolting. I was in the restroom when snacks and drinks were served and was not asked if i wanted any. I had to ask for water finally.

Wi Fi was horrible kept cutting out the whole time and too expensive

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

Crew was pleasant; flight was on time. Paid extra for early bird check-in and still got B boarding.

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

I like that it was on time and the staff was friendly.

Crew was great - friendly and helpful with boarding - letting folks know where overhead space was available thus getting us out of the gate on time.

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

They canceled our flight and left us stranded to figure it out

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

Being stick waiting for gate at ORD cause me to almost miss my connecting flight…being deaf United made no no effort to keep me updated as I couldn’t hear the PA

As usual, United scheduling is completely misleading. A 54-minute layover at O’Hare is too short to make a lot of connections, especially since the flight landed “on time” but had to wait on the taxiway 15 minutes for a gate to open up. Then it takes another 10 minutes to exit the plane before one can run to another concourse to catch a connecting flight.

My luggage is missing and contour is doing a terrible service helping finding it. Unbelievable and the worst experience ever. I would love get my money back.

Flight was cancelled, but they got him on an earlier delayed rescheduled one. Arrived Chicago 2 hours later than expected but long layover so it worked.

Crew very helpful, weather made the flight less than optimal.

Flight was fine. I just forgot how smaller planes have more dips and seats in high winds.

It’s the only flight connecting Marion to Chicago, I do appreciate that it was available!

The flight was delayed and then less than 30 mins before boarding they cancelled the flight when clearly they had to have known earlier that they were going to have to cancel. There was only one person there available to talk to and all he could do was tell us to call reservations our self. Due to high call volume I waited 2 hours to even get rebooked on a flight to a different city where I would still have to drive 1 hr to my destination, only option for me. While waiting to talk to reservations people were getting emails with new flight info and the flights were days out and sone even a week out. . I did not get compensated in anyway after having spent all day at the airpot, not even a food voucher. Very disappointed, terrible experience.

Information regarding the delayed flight could have been better, and the Contour airlines app needs some serious updates. But overall, the crew was great and the flight was uneventful.

The boarding procedure is as easy and the crew very friendly.

This is a great airline for what it is. You get 1 checked bag included per passenger and the space per seat is incredible. It’s an E135 aircraft that is configured to seat 50 people but they have removed 20 seats and only seat 30 so you have a ton of legroom. They are doing things right and have a great product for what it is. It’s not going to knock your socks off in experience overall but the plane, although dates, was nice and clean and the crew was great. The flights were on time and super efficient. Will travel them again. I am a frequent traveler on all the larger airlines and this was just as good as any regional carrier, if not better. I expect big things out of Contour in the years to come.

Not waiting on the tarmac for an hour and 20 minutes

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

Delayed due to no crew. On a major holiday travel day.

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight from Buffalo to Chicago was on an older and smaller plane. Seating was tight. Looking closely at the interior of the aircraft there were definitely signs of aging and wear.

The flight encountered a delay exceeding 4 hours. The food voucher issued was valued at $12, insufficient to cover our meal expenses. Consequently, I was unable to take my medication, leading to a drop in blood sugar levels and exacerbating my anxiety.

Airplane was cold. Flight attendants were rude. Phone charger did not work. No food available.

3hour delay In the last 3 months i had 3 flights and 2 of these had a more than 2:40 hrs delayed

My initial flight to ORD was extended without reason. We circled the airport a few time and then drove on the ground for at least 20 minutes. These kinds of delays are annoying but somewhat expected… it would be nice if the crew would make an announcement to give updates on how long we could expect to be delayed.

The flight was uneventful. What was a problem was I was delayed getting home one entire day because the flight from Sacramento was delayed. That made getting to my connecting flight impossible. I had to stay another night at the hotel and incur that expense as a result.

Communication could be better but the staff and crew were over the top friendly and helpful, The flight itself was smooth.

flight was cancelled literally at 10pm the night before an early morning flight with hardly any time to reschedule. Will never book with kayak again.

My flight was cancelled 12 hours before takeoff. I was not able to reschedule another flight to make connections and had to cancel the entire trip. The ticket that was supposed to replace the cancelled flight had no boarding pass and I was unable to get one at the airport so I was denied access to the rescheduled flight. I was refunded but I missed my daughter's birthday.

I had a family emergency and couldn’t make the flight, and they wouldn’t let me cancel/refund it (a *month* ahead of time), were especially difficult with me on the phone, and wouldn’t let me even so much as reschedule the flight or get credit.

Flight was cancelled, communication was poor and should have canceled flight much earlier.

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."

Book cheap flights from Missouri to Illinois

Recent round-trip flight deals

2/19Wed
1 stopFrontier
16h 50mMCI-ORD
3/3Mon
1 stopFrontier
12h 45mORD-MCI
$113
2/19Wed
1 stopFrontier
27h 42mMCI-MDW
3/3Mon
1 stopFrontier
12h 55mMDW-MCI
$113
2/27Thu
1 stopSouthern / Mokulele
19h 25mSTL-ORD
3/6Thu
1 stopSouthern / Mokulele
11h 45mORD-STL
$130
2/19Wed
1 stopSouthern / Mokulele
3h 35mSTL-ORD
2/28Fri
1 stopSouthern / Mokulele
11h 45mORD-STL
$131
2/26Wed
nonstopUnited Airlines
1h 22mSTL-ORD
2/27Thu
nonstopUnited Airlines
1h 21mORD-STL
$137
2/20Thu
nonstopSouthwest
1h 05mMCI-STL
2/24Mon
nonstopSouthwest
1h 10mSTL-MCI
$137
2/25Tue
nonstopSouthwest
1h 10mSTL-MDW
3/4Tue
nonstopSouthwest
1h 15mMDW-STL
$137
2/19Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
2/28Fri
nonstopAmerican Airlines
1h 27mORD-STL
$152
2/28Fri
nonstopAmerican Airlines
1h 21mSTL-ORD
3/7Fri
nonstopAmerican Airlines
1h 18mORD-STL
$167
3/3Mon
nonstopUnited Airlines
1h 19mSTL-ORD
3/4Tue
nonstopUnited Airlines
1h 21mORD-STL
$194

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Recent one-way flight deals

3/14Fri
nonstopSun Country Air
1h 17mSTL-ORD
$49
3/1Sat
1 stopFrontier
8h 39mSTL-MDW
$55
2/20Thu
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$62
3/4Tue
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$65
3/4Tue
nonstopUnited Airlines
1h 22mSTL-ORD
$69
4/29Tue
nonstopSouthwest
1h 05mMCI-STL
$69
3/3Mon
nonstopSouthwest
1h 10mSTL-MDW
$69
4/19Sat
nonstopAmerican Airlines
1h 24mSTL-ORD
$84
3/3Mon
nonstopUnited Airlines
1h 22mSTL-ORD
$97
5/14Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
$129

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Last minute flights from Missouri to Illinois

Last minute flight, train and bus deals

2/1Sat
nonstopContour
1h 40mCGI-ORD
2/3Mon
nonstopContour
1h 35mORD-CGI
$198
1/31Fri
multi-stopSouthern / Mokulele
3h 32mSTL-ORD
2/4Tue
multi-stopSouthern / Mokulele
3h 55mORD-STL
$237
1/31Fri
nonstopUnited Airlines
2h 00mJLN-ORD
2/2Sun
nonstopUnited Airlines
2h 04mORD-JLN
$321
2/1Sat
nonstopAmerican Airlines
1h 36mCOU-ORD
2/5Wed
nonstopAmerican Airlines
1h 29mORD-COU
$379
2/1Sat
multi-stopAmerican Airlines
6h 56mCOU-ORD
2/5Wed
nonstopAmerican Airlines
1h 29mORD-COU
$389
2/1Sat
multi-stopUnited Airlines
16h 49mSGF-ORD
2/2Sun
nonstopUnited Airlines
1h 51mORD-SGF
$494
2/4Tue
nonstopSouthwest
1h 30mMCI-MDW
2/4Tue
nonstopSouthwest
1h 35mMDW-MCI
$546
2/4Tue
nonstopSouthwest
1h 25mMCI-MDW
2/4Tue
multi-stopSouthwest
5h 50mMDW-MCI
$556
2/3Mon
multi-stopDelta
6h 21mSTL-MDW
2/4Tue
multi-stopDelta
6h 31mMDW-STL
$571
2/3Mon
multi-stopDelta
4h 40mSGF-MDW
2/4Tue
multi-stopDelta
5h 52mMDW-SGF
$609

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Everything you need to know for your flight to Illinois

Cabin class types available on flights to Missouri

Cabin classes available on flights to Missouri. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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