$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 1/8. 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

July

Cheapest flight

$49
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from St. Louis to Chicago Midway Airport

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 to Illinois from Missouri 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 to Illinois with an airline and back to Missouri 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 to Illinois from Missouri 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 4758 reviews
7.2Food
7.7Entertainment
8.1Comfort
8.2Boarding
8.7Crew
Airline reviews

It was 2 hours 45 minutes late, for no apparently clear reason.

2.0 MediocreSudhir, Dec 2024LGA - MCI
Read more Southwest reviews

It was 2 hours 45 minutes late, for no apparently clear reason.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

Crew was great flight was great baggage claim was a failure. It took over 1 hour for bags to arrive. Poor communication poor effort when I spoke to the supervisor about the delay

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.

No space for our carryon and needed to check at plane before boarding !

Flight was ok. Boarding wasn’t fun. Flights were delayed by 12 minutes on each leg.

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

Pros: "Nothing . Would never use them again!!"
Cons: "Showed up 40 min early as instructed and they closed the gate to get our boarding pass after their app to get electronic pass did not work . We had no check in luggage , just a backpack !! No customer service !!"

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.

The seats on the aircraft are like sitting in a rock. During the boarding process they recognize Active Duty Military, why don’t they recognize Retired Military. I’ve always preferred Delta, this flight confirmed why I still prefer Delta.

when you can say you don't remember being at any point upset during a flight, the airline is winning .

The staff was very friendly. The seats seemed quite small. Overall the flight was pleasant.

It was literally one of the worst travel experiences ever. My flight got delayed by over an hour and there was no communication of this from the gate staff. I realized it by checking the screen periodically. Once on board the flight attendants continued to serve alcohol to a man who was clearly already drunk and that was making a bunch of commotion. Never again will I fly United!

Charging and entertainment didn't work. The meal was horrible. They only came by with the drink cart one time for the 8 hour flight. They did come by with water a couple times.

Exceptional, I’d like to specifically recognize Robert for his outstanding customer service. He is professional, pleasant, and personable.

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.

This flight was fine but had no time to breathe as the connection was late from Sea to ORD.. Super stressful. If we checked bags, the trip would have been very distressed.

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

2/11Tue
nonstopUnited Airlines
1h 25mSTL-ORD
2/18Tue
nonstopUnited Airlines
1h 20mORD-STL
$97
2/23Sun
1 stopSouthern / Mokulele
19h 25mSTL-ORD
2/28Fri
1 stopSouthern / Mokulele
11h 45mORD-STL
$102
1/9Thu
1 stopFrontier
15h 14mSTL-MDW
1/13Mon
1 stopFrontier
11h 54mMDW-STL
$108
1/9Thu
1 stopFrontier
15h 14mSTL-MDW
1/13Mon
1 stopFrontier
11h 54mMDW-STL
$109
1/21Tue
nonstopSouthwest
1h 10mSTL-MDW
1/23Thu
nonstopSouthwest
1h 15mMDW-STL
$113
1/23Thu
nonstopAmerican Airlines
1h 28mSTL-ORD
1/30Thu
nonstopAmerican Airlines
1h 28mORD-STL
$127
1/9Thu
nonstopAmerican Airlines
1h 28mSTL-ORD
1/13Mon
nonstopAmerican Airlines
1h 24mORD-STL
$128
1/9Thu
nonstopSouthwest
1h 10mSTL-MDW
1/13Mon
nonstopSouthwest
1h 15mMDW-STL
$128
1/21Tue
1 stopDelta
6h 38mSTL-MDW
1/23Thu
1 stopDelta
6h 34mMDW-STL
$176
1/9Thu
1 stopDelta
6h 25mSTL-ORD
1/11Sat
1 stopDelta
7h 08mORD-STL
$176

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Recent one-way flight deals

1/8Wed
nonstopSouthwest
1h 10mSTL-MDW
$49
2/11Tue
nonstopUnited Airlines
1h 36mSTL-ORD
$49
1/18Sat
nonstopSouthern / Mokulele
1h 57mUIN-ORD
$53
2/9Sun
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$53
2/3Mon
nonstopUnited Airlines
1h 33mSTL-ORD
$64
1/25Sat
nonstopSouthwest
1h 15mSTL-MDW
$64
1/8Wed
1 stopDelta
6h 14mSTL-MDW
$88
1/25Sat
nonstopAmerican Airlines
1h 29mCOU-ORD
$90
1/8Wed
2 stopsDelta
7h 52mSTL-MDW
$93
1/24Fri
nonstopAmerican Airlines
1h 43mSGF-ORD
$109

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Last minute flights from Missouri to Illinois

Last minute flight, train and bus deals

12/29Sun
multi-stopSouthern / Mokulele
3h 37mSTL-ORD
1/5Sun
multi-stopSouthern / Mokulele
3h 55mORD-STL
$228
12/30Mon
multi-stopSouthern / Mokulele
3h 32mSTL-ORD
1/2Thu
multi-stopSouthern / Mokulele
5h 05mORD-STL
$230
12/27Fri
nonstopUnited Airlines
2h 00mJLN-ORD
1/1Wed
nonstopUnited Airlines
1h 59mORD-JLN
$300
12/30Mon
nonstopSouthwest
1h 10mSTL-MDW
1/6Mon
nonstopSouthwest
1h 15mMDW-STL
$340
12/30Mon
multi-stopSouthwest
5h 10mSTL-MDW
1/6Mon
nonstopSouthwest
1h 20mMDW-STL
$349
12/30Mon
multi-stopDelta
5h 04mSTL-MDW
1/6Mon
multi-stopDelta
9h 06mMDW-STL
$408
12/30Mon
nonstopAmerican Airlines
1h 32mCOU-ORD
1/2Thu
nonstopAmerican Airlines
1h 29mORD-COU
$451
12/30Mon
multi-stopAmerican Airlines
7h 07mCOU-ORD
1/2Thu
nonstopAmerican Airlines
1h 29mORD-COU
$461
12/29Sun
nonstopUnited Airlines
1h 49mMCI-ORD
12/31Tue
nonstopUnited Airlines
1h 45mORD-MCI
$485
12/30Mon
multi-stopDelta
6h 26mMCI-ORD
1/11Sat
multi-stopDelta
4h 38mORD-MCI
$488

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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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