$63 Find Cheap Flights from Missouri to Illinois

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Good to know

Low season

January

High season

May

Cheapest flight

$63
Best time to beat the crowds with an average 2% drop 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.

  • Which is the cheapest airport to fly into in Illinois?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Quincy Regional Airport (UIN), with an average flight price of $97.

  • What is the cheapest day to fly to Illinois?

    Based on KAYAK data, the cheapest day to fly to Illinois is Thursday where round-trip tickets can be as cheap as $813. On the other hand, the most expensive day to fly is Tuesday, where round-trip prices are $1,041 on average.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $670 on average. Morning departures are around 37% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,303.

  • What is the cheapest flight to Illinois?

    The cheapest ticket to Illinois from Missouri found in the last 72 hours was to Chicago O'Hare Intl Airport, at $123 round-trip. The most popular route is Cape Girardeau (CGI) to Chicago O'Hare Intl Airport (ORD) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $123.

  • What is the cheapest month to fly from Missouri to Illinois?

    The cheapest month for flights from Missouri to Illinois is January, when tickets cost $324 (return) on average. On the other hand, the most expensive months are March and October, when the average cost of round-trip tickets is $443 and $431 respectively.

  • How far in advance should I book a flight from Missouri to Illinois?

    To get a below average price on the flight from Missouri to Illinois, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

  • How long is the flight to Illinois?

    An average nonstop flight from Missouri to Illinois takes 6h 55m, covering a distance of 302 miles. The shortest route is Kansas City (MCI) to St. Louis (STL) with an average flight time of 1h 00m.

  • What are the most popular destinations in Illinois?

    Based on KAYAK flight searches, the most popular destination is Chicago (96% of total searches to Illinois). The next most popular destinations are St. Louis (2%) and Moline (0%). Searches for flights to Quincy (0%), to Decatur (0%) and to Peoria (0%) are also popular.

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.
8.0
SouthwestOverall score based on 4274 reviews
7.1Food
8.2Boarding
7.6Entertainment
8.0Comfort
8.6Crew
Airline reviews

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

6.0 GoodCarolynn, Mar 2025KOA - SMF
Read more Southwest reviews

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Short flight with plenty of open seats. Drinks and snacks were still provided even on such a short flight. <1 hr

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Very good. Sad to learn Southwest is going start to charge for bags

Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

WiFi on the flight was not working. Thus, entertainment options were limited.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

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

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Crew professional. Easy bag drop off. On time. Good entertainment.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

Per usual, flight status, staff courtesy and professionalism were excellent

Everything was on time, we arrived early, everything worked well.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

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.

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

We had a wonderful flight due to the care of our experienced pilot and copilot and the magnificent air views from our comfortable seats. What excitement to be in such a small plane with such magnificent around us.

Multiple time changes, then we left earlier than we were told.

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."

Book cheap flights from Missouri to Illinois

Recent round-trip flight deals

5/2Fr
1 stopSouthern / Mokulele
19h 25mSTL-ORD
5/9Fr
1 stopSouthern / Mokulele
11h 45mORD-STL
$123
4/30Mi
1 stopSouthern / Mokulele
19h 25mSTL-ORD
5/7Mi
1 stopSouthern / Mokulele
15h 25mORD-STL
$127
4/26Sa
nonstopContour
1h 40mCGI-ORD
4/27So
nonstopContour
1h 35mORD-CGI
$166
5/25So
nonstopContour
1h 40mCGI-ORD
8/5Di
nonstopContour
1h 35mORD-CGI
$178
4/24Do
nonstopAmerican Airlines
1h 40mSGF-ORD
4/27So
nonstopAmerican Airlines
1h 44mORD-SGF
$189
4/24Do
nonstopAmerican Airlines
1h 40mSGF-ORD
4/27So
nonstopAmerican Airlines
1h 48mORD-SGF
$190
4/19Sa
nonstopUnited Airlines
1h 40mMCI-ORD
4/22Di
nonstopUnited Airlines
1h 48mORD-MCI
$197
4/23Mi
nonstopSouthwest
1h 25mMCI-MDW
4/25Fr
nonstopSouthwest
1h 30mMDW-MCI
$197
4/23Mi
nonstopSouthwest
1h 25mMCI-MDW
4/24Do
1 stopSouthwest
3h 50mMDW-MCI
$207
4/17Do
nonstopUnited Airlines
1h 46mMCI-ORD
4/21Mo
nonstopUnited Airlines
1h 48mORD-MCI
$213

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Recent one-way flight deals

5/3Sa
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$63
4/28Mo
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$64
5/4So
1 stopFrontier
12h 18mMCI-STL
$86
6/14Sa
1 stopFrontier
8h 30mSTL-MDW
$86
4/22Di
nonstopUnited Airlines
1h 40mMCI-ORD
$99
4/22Di
nonstopSouthwest
1h 25mMCI-MDW
$99
5/14Mi
nonstopUnited Airlines
1h 30mSTL-ORD
$109
5/6Di
nonstopSouthwest
1h 10mSTL-MDW
$109
5/6Di
nonstopAmerican Airlines
1h 34mMCI-ORD
$113
5/30Fr
nonstopAmerican Airlines
1h 19mSTL-ORD
$119

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Last minute flights from Missouri to Illinois

Last minute flight, train and bus deals

4/5Sa
multi-stopFrontier
11h 00mSTL-MDW
4/9Mi
multi-stopFrontier
11h 00mMDW-STL
$180
4/5Sa
multi-stopFrontier
10h 28mSTL-ORD
4/9Mi
multi-stopFrontier
12h 01mORD-STL
$180
4/4Fr
multi-stopSouthern / Mokulele
3h 32mSTL-ORD
4/11Fr
multi-stopSouthern / Mokulele
11h 45mORD-STL
$202
4/4Fr
multi-stopSouthern / Mokulele
7h 12mSTL-ORD
4/11Fr
multi-stopSouthern / Mokulele
11h 45mORD-STL
$217
4/5Sa
nonstopAmerican Airlines
1h 39mSGF-ORD
4/13So
nonstopAmerican Airlines
1h 48mORD-SGF
$261
4/5Sa
multi-stopAmerican Airlines
6h 09mSGF-ORD
4/13So
nonstopAmerican Airlines
1h 48mORD-SGF
$271
4/4Fr
nonstopSouthwest
1h 20mMCI-MDW
4/23Mi
nonstopSouthwest
1h 30mMDW-MCI
$429
4/4Fr
multi-stopSouthwest
4h 50mMCI-MDW
4/23Mi
nonstopSouthwest
1h 30mMDW-MCI
$439
4/7Mo
nonstopUnited Airlines
1h 40mMCI-ORD
4/9Mi
nonstopUnited Airlines
1h 45mORD-MCI
$520
4/8Di
nonstopUnited Airlines
1h 40mMCI-ORD
4/15Di
nonstopUnited Airlines
1h 45mORD-MCI
$606

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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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