$100 Find Cheap Flights from Chattanooga 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 Chattanooga to Illinois departing on 7/30. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chattanooga to Illinois, 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 Chattanooga to Illinois, as well as popular online travel agencies
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Cheap Flights from Chattanooga to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$184
Moline
Moline1 stop$309
Peoria
Peoria1 stop$289
St. Louis
St. Louis1 stop$271
Chicago
Chicago1 stop$184
Moline
Moline1 stop$309
Peoria
Peoria1 stop$289
St. Louis
St. Louis1 stop$271

Book Cheap Chattanooga to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chattanooga to Illinois 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Chattanooga to Illinois

Thu, Jul 23 - Sat, Aug 8
Multiple Airlines Logo
8:59 am - 12:15 pm
CHA
-
ORD
28h 16m
1 stop
Multiple Airlines Logo
8:05 am - 8:07 am
ORD
-
CHA
23h 02m
1 stop
$184Multiple Airlines
Sun, Jul 19 - Sat, Aug 8
Multiple Airlines Logo
8:59 am - 12:15 pm
CHA
-
ORD
28h 16m
1 stop
Multiple Airlines Logo
8:05 am - 8:07 am
ORD
-
CHA
23h 02m
1 stop
$194Multiple Airlines
Sat, Jul 4 - Sat, Jul 4
United Airlines Logo
10:27 am - 11:29 am
CHA
-
ORD
2h 02mnonstop
United Airlines Logo
2:30 pm - 5:19 pm
ORD
-
CHA
1h 49mnonstop
$244United Airlines
Wed, Aug 26 - Mon, Aug 31
United Airlines Logo
6:15 am - 7:20 am
CHA
-
ORD
2h 05mnonstop
United Airlines Logo
6:59 am - 9:51 am
ORD
-
CHA
1h 52mnonstop
$249United Airlines
Thu, Aug 6 - Tue, Sep 1
American Airlines Logo
5:52 pm - 7:14 pm
CHA
-
ORD
2h 22mnonstop
American Airlines Logo
2:34 pm - 5:22 pm
ORD
-
CHA
1h 48mnonstop
$250American Airlines
Thu, Aug 6 - Mon, Aug 10
Delta Logo
3:01 pm - 6:33 pm
CHA
-
MDW
4h 32m
1 stop
Delta Logo
9:24 am - 2:17 pm
MDW
-
CHA
3h 53m
1 stop
$269Delta
Sat, Jul 4 - Wed, Jul 8
Delta Logo
3:41 pm - 6:07 pm
CHA
-
STL
3h 26m
1 stop
Delta Logo
9:24 am - 2:02 pm
STL
-
CHA
3h 38m
1 stop
$271Delta
Thu, Jun 25 - Thu, Jul 2
American Airlines Logo
6:05 am - 9:23 am
CHA
-
PIA
4h 18m
1 stop
American Airlines Logo
6:58 pm - 11:51 pm
PIA
-
CHA
3h 53m
1 stop
$289American Airlines
Fri, Jul 3 - Mon, Jul 6
Allegiant Air Logo
9:43 pm - 9:15 am
CHA
-
RFD
12h 32m
1 stop
Allegiant Air Logo
8:39 am - 9:34 am
RFD
-
CHA
23h 55m
1 stop
$325Allegiant Air
Fri, Jul 10 - Mon, Jul 13
Allegiant Air Logo
9:43 pm - 9:15 am
CHA
-
RFD
12h 32m
1 stop
Allegiant Air Logo
8:39 am - 9:34 am
RFD
-
CHA
23h 55m
1 stop
$349Allegiant Air
Booking Insights

KAYAK's insights & trends for Chattanooga to Illinois flights

Get data-powered insights and trends into flights from Chattanooga to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Chattanooga to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Chattanooga to Illinois departing in July.

What is the cheapest Chattanooga to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Chattanooga found in the last 5 days was to Chicago, at $249 round-trip. The most popular route is from Chattanooga (CHA) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $249.

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

The average price for all round-trip flights from Chattanooga to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $383 on average. Morning departures are around 3% more expensive 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 $421.

Can I save money by flying with a layover from Chattanooga to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $323, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Chattanooga to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chattanooga to Illinois, 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 Chattanooga to Illinois is March, when tickets cost $139 (return) on average. On the other hand, the most expensive months are January and April, when the average cost of round-trip tickets is $189 and $189 respectively.

What’s the cheapest day of the week to fly from Chattanooga to Illinois?

The average price of all round-trip flights from Chattanooga to Illinois clicked on KAYAK for each day over the last 12 months.

When flying from Chattanooga to Illinois, you should consider leaving on a Friday and avoid Sundays if you are looking for the best rates. For your return to Chattanooga, you’ll find the best rates on Wednesdays and the most expensive ones on Mondays.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chattanooga to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Chattanooga to Illinois, you should book around 3 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonDecember
Cheapest flight$100
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 29% increase in price.
Flight from Chattanooga to Chicago O'Hare Airport

FAQs - booking Illinois flights

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Chattanooga 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 Chattanooga 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 Chattanooga 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 Chattanooga 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 Chattanooga to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Chattanooga to the following destinations at these prices or less: Chicago $293 one-way - $320 round-trip

Reviews of the top 3 airlines serving from Chattanooga to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Chattanooga to Illinois. 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 Chattanooga 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.
7.8
DeltaOverall score based on 8395 reviews
8.5Crew
8.1Boarding
7.8Entertainment
7.8Comfort
7.2Food
Airline reviews

Connection flights should be spaced out farther because too close I missed my connection.

8.0 ExcellentAnonymous, Jun 2026
PHL - ATL
Read more Delta reviews

Connection flights should be spaced out farther because too close I missed my connection.

Definitely a southern flavor. Cordiality was evident even though no drinks or snacks were served.

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

Left /arrived on time. Decent seat space. Like the wifi/plugs and entertainment. Windows and tray table were kinda gross. Attendants didn't start snack service til 40mins before landing. Two rows before us, captain came on to say there's turbulence and recalled staff to seats. So, no drink/snack. Later, attendants didn't stop to see if we had trash nor even look our way. Felt invisible! Almost all pilot announcements were not only unintelligible, but so quiet. We had no idea what she said.

Average seat comfort, a drink and chips were provided, early boarding because we checked a carryon at the gate was nice. Ticket pricing shenanigans, including fees to pick a seat, check a bag, and get food onboard - evidence the industry is reinvigorating last century’s strategies- destroys the experience before one ever arrives at the airport. It’s difficult to recognize any value or sustain loyalty in the end-to-end process making air travel more drudgery than pleasure.

Gate agent was unhelpful for handicapped boarding. Flight attendant seemed untrained.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Planes were clean, no water or snacks on either flight.

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

The flight from LA to Chicago was smooth and service was very good overall.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

They lost my baggage and I am still struggling to the information and update

Requested early boarding to disinfect seat, tray table, etc. before general boarding. Instructed to board after wheelchair passengers. Waited on jet bridge behind 12 wheelchair passengers. Stopped immediately after entering plane to wait for gate agent in rear of plane cleaning a seat that was wet, got to my row and found both seats adjacent to mine already occupied, with the lack of room making it impossible for me to clean my own space and defeating the purpose of my boarding early. Cleaned the armrests and tray table as best I could.

The wifi experience is awful. I had to try again and again, taking over 30 minutes, to connect to the wifi. I had to watch the same two ads over and over until I was finally successful. Once connected, it was anything but "high speed" and disconnected at least three times during the flight.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

The new planes (American Eagle) are beautiful and especially comfortable. The flight attendants are consistently professional and courteous. And, while it may seem inconsequential, the new liquid tube of coffee creamer—in contrast to the powdered coffee creamer—makes all the difference in a cup of coffee.

Everything you need to know for your flight from Chattanooga to Illinois

Information on your arrival and departure airports