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Find cheap flights from Chicago to Illinois from $49

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Illinois departing on 6/5. 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 6/8
Sat 6/15

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Best Illinois Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Peoria
Peorianonstop$254
Bloomington
Bloomingtonnonstop$404
St. Louis
St. Louisnonstop$97

Good to know

Low season

October

High season

September

Cheapest flight

$49
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Chicago O'Hare Airport to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Chicago 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 Chicago to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from Chicago 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 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 Chicago with another airline.

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

  • Morning departure is around 2% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Chicago to Illinois

 
Need help choosing which airline to fly with from Chicago 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.
8.3
EVA AirOverall score based on 1524 reviews
8.2Comfort
8.4Boarding
8.6Crew
8.0Entertainment
7.9Food
Airline reviews

The type of the food requested (Asian vegetarian) was not properly met with. They have very limited snack items that may compensate for the main meals.

8.0 ExcellentAnonymous, Apr 2024TPE - JFK
Read more about EVA Air reviews

The type of the food requested (Asian vegetarian) was not properly met with. They have very limited snack items that may compensate for the main meals.

The quality of the food is pretty good. Thank you, EVA Air.

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

Eva Air's Business Class is pretty decent. With the given price, I think that the food can be better.

Pleasant crew. Very long flight, a bit uncomfortable at times being seated, but not too bad.

No ice for the drinks. Only gave a half a cup of your beverage. Not enough water. I got very dehydrated.

Eva air is a good airline. The seats on the way to Taipei could have certainly been more comfortable, but all in all it was a pretty good experience.

Eva is one of the top airlines in Asia... but often are over priced. Finally found a reasonable rate.

My original flight was rescheduled & EVA did a good job rescheduling my flight & connecting flight.

Polite hard working crew. No complaints really. Meals were not to my liking.

I’ve had a couple flights this week on United that were delayed by an hour or more

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

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

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.

Flight was delayed at departure due to weather and the need for de-icing. The flight was smooth but there was a delay at arrival due to weather. We were in a hold for 20 minutes or more. The flight arrived more than 30 minutes late. Airlines have no control over the weather and I'm glad that they follow all safety procedures. Had to wait a long time for my checked luggage. Whole process was slow and the bags arrived wet due to the rain. The onboard wifi and entertainment access was spotty and the signal was dropped several times. Otherwise the crew was great and friendly. They tried to get everyone's bags stowed and seated so we could take off.

Regarding the boarding: it needs more efforts to make it more convenient

Deicing in Denver took forever and I almost missed my connection. De-ice faster! Not Americans fault.

Crew was nice, explained emergency protocol very well. Flight took off and arrived on time. Pilot explained the small delay that occurred with docking and providing updates. I would definitely fly spirit again.

The seat are terrible. Don’t even think of sleeping on a Spirit flight. The kids that run the plane aka flight attendants are pretty rude and straight forward. They get the job done but without class.

I had a death in my family and booked my flight on Spirit. My flight was cancelled the morning of my flight, no explanation, no help to rebook, nobody to talk to. The next available flight was 2days later !!!! Terrible airline, will NEVER fly with them again!

They took a horrible route with a lot of turbulence and I eneded up getting sick. Even if the flight takes longer. Don't put people life at risk just to get to the airport on time.

Every thing was fine ,low price,easy on time ,clean, good staff, really no issues

Had to board plan 2x due to lack of security check after 1st boarding

The flight attendants were very personable, extremely friendly, and had a very good feeling of the energy around them not to mention they’re very funny and engaging. What made up for the discomfort of the seats and the fact that the plane sat for a long time on the Turmac. Not sure if the pilot was new, but the landing was very rough sort of like I was at a magic mountain theme park ride that was built in 1959

Miserable. The crew was rude, the flight was delayed 5 hours for mechanical reasons and then “weather” even though other planes were leaving.

They kept Changing the flight times. It was delayed several times and at one point it was supposed to depart at 3.40am! At which point we ended up staying overnight and booked long a separate United flight for early morning departure. The spirit flight then got moved up and left at 1.30 in the morning when it was supposed to leave at 9.40pm the night before.

Flight was delayed 2+ hours missed a concert because of it…

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Book cheap flights from Chicago to Illinois

Recent round-trip flight deals

6/5Wed
nonstopAmerican Airlines
1h 13mORD-STL
6/12Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
$97
5/30Thu
nonstopAmerican Airlines
1h 13mORD-STL
6/3Mon
nonstopAmerican Airlines
1h 16mSTL-ORD
$107
10/29Tue
nonstopUnited Airlines
1h 18mORD-STL
11/1Fri
nonstopUnited Airlines
1h 16mSTL-ORD
$135
10/14Mon
nonstopUnited Airlines
1h 19mORD-STL
10/15Tue
nonstopUnited Airlines
1h 21mSTL-ORD
$137
5/21Tue
1 stopSpirit Airlines
11h 54mORD-STL
5/28Tue
2 stopsSpirit Airlines
19h 20mSTL-ORD
$144
6/5Wed
1 stopDelta
5h 48mMDW-STL
6/12Wed
1 stopDelta
5h 39mSTL-MDW
$156
5/30Thu
1 stopDelta
5h 43mORD-STL
6/3Mon
1 stopDelta
4h 44mSTL-ORD
$156
5/30Thu
1 stopSpirit Airlines
12h 29mORD-STL
6/3Mon
1 stopSpirit Airlines
14h 35mSTL-ORD
$157
5/19Sun
1 stopFrontier
17h 31mMDW-STL
5/22Wed
1 stopFrontier
5h 22mSTL-MDW
$227
6/21Fri
1 stopFrontier
7h 10mMDW-STL
7/23Tue
1 stopFrontier
11h 04mSTL-MDW
$258

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Recent one-way flight deals

6/5Wed
nonstopAmerican Airlines
1h 13mORD-STL
$49
9/27Fri
nonstopAmerican Airlines
1h 16mORD-STL
$59
6/4Tue
1 stopSpirit Airlines
14h 13mORD-STL
$62
9/25Wed
1 stopDelta
6h 54mMDW-STL
$78
8/7Wed
1 stopDelta
6h 57mORD-STL
$78
6/3Mon
1 stopSpirit Airlines
15h 58mORD-STL
$79
5/15Wed
1 stopFrontier
8h 30mORD-STL
$84
5/28Tue
1 stopFrontier
13h 03mMDW-STL
$105
6/7Fri
nonstopUnited Airlines
1h 19mORD-STL
$129
6/13Thu
nonstopUnited Airlines
1h 12mORD-PIA
$170

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Last minute flights from Chicago to Illinois

Last minute flight, train and bus deals

5/12Sun
multi-stopSouthern / Mokulele
3h 05mORD-STL
5/13Mon
multi-stopSouthern / Mokulele
3h 15mSTL-ORD
$173
5/13Mon
multi-stopSouthern / Mokulele
7h 50mORD-STL
5/20Mon
multi-stopSouthern / Mokulele
3h 52mSTL-ORD
$177
5/13Mon
multi-stopFrontier
23h 00mMDW-STL
5/20Mon
multi-stopFrontier
17h 45mSTL-MDW
$315
5/13Mon
multi-stopFrontier
11h 10mMDW-STL
5/14Tue
multi-stopFrontier
12h 37mSTL-MDW
$318
5/10Fri
nonstopUnited Airlines
1h 26mORD-STL
5/11Sat
nonstopUnited Airlines
1h 20mSTL-ORD
$426
5/11Sat
nonstopUnited Airlines
1h 26mORD-STL
5/11Sat
nonstopUnited Airlines
1h 20mSTL-ORD
$431
5/11Sat
nonstopAmerican Airlines
1h 20mORD-STL
5/11Sat
multi-stopAmerican Airlines
5h 09mSTL-ORD
$445
5/14Tue
nonstopAmerican Airlines
1h 00mORD-SPI
5/18Sat
nonstopAmerican Airlines
1h 10mSPI-ORD
$449
5/12Sun
multi-stopSpirit Airlines
11h 10mORD-STL
5/14Tue
multi-stopSpirit Airlines
19h 20mSTL-ORD
$738
5/10Fri
multi-stopSpirit Airlines
23h 02mORD-STL
5/12Sun
multi-stopSpirit Airlines
21h 05mSTL-ORD
$789

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Flights to Illinois

Return flight deals:

Illinois - Chicago

Cabin classes:

$578
$1,220
$126