$105 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 7/16. 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$189
Moline
Moline1 stop$283
Peoria
Peoria1 stop$289
St. Louis
St. Louis1 stop$271
Chicago
Chicago1 stop$189
Moline
Moline1 stop$283
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 30 - Wed, Aug 5
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
$189Multiple Airlines
Sun, Aug 2 - Wed, Aug 5
Multiple Airlines Logo
9:09 am - 12:15 pm
CHA
-
ORD
28h 06m
1 stop
Multiple Airlines Logo
8:05 am - 8:07 am
ORD
-
CHA
23h 02m
1 stop
$199Multiple Airlines
Fri, Jul 24 - Sat, Jul 25
United Airlines Logo
6:00 am - 6:59 am
CHA
-
ORD
1h 59mnonstop
United Airlines Logo
5:50 pm - 8:49 pm
ORD
-
CHA
1h 59mnonstop
$249United Airlines
Fri, Jul 3 - Mon, Jul 6
American Airlines Logo
6:08 am - 7:30 am
CHA
-
ORD
2h 22mnonstop
American Airlines Logo
8:59 pm - 11:51 pm
ORD
-
CHA
1h 52mnonstop
$250American Airlines
Fri, Jul 24 - Sat, Aug 1
American Airlines Logo
4:33 pm - 10:00 pm
CHA
-
ORD
6h 27m
1 stop
American Airlines Logo
9:49 pm - 12:43 am
ORD
-
CHA
1h 54mnonstop
$259American Airlines
Tue, Jul 7 - Thu, Aug 6
Delta Logo
6:00 am - 9:13 am
CHA
-
MDW
4h 13m
1 stop
Delta Logo
5:10 pm - 11:43 pm
MDW
-
CHA
5h 33m
1 stop
$269Delta
Tue, Aug 18 - Wed, Aug 26
Delta Logo
5:35 am - 9:54 am
CHA
-
STL
5h 19m
1 stop
Delta Logo
7:00 am - 1:57 pm
STL
-
CHA
5h 57m
1 stop
$271Delta
Fri, Jul 31 - Wed, Aug 5
Allegiant Air Logo
9:43 pm - 7:47 am
CHA
-
MLI
11h 04m
1 stop
Allegiant Air Logo
3:03 pm - 2:06 pm
MLI
-
CHA
22h 03m
1 stop
$283Allegiant Air
Fri, Jul 3 - Wed, Jul 8
Allegiant Air Logo
9:43 pm - 9:15 am
CHA
-
RFD
12h 32m
1 stop
Allegiant Air Logo
4:47 pm - 1:59 pm
RFD
-
CHA
20h 12m
1 stop
$303Allegiant Air
Tue, Jul 28 - Tue, Aug 4
United Airlines Logo
6:00 am - 10:04 am
CHA
-
MLI
5h 04m
1 stop
United Airlines Logo
1:14 pm - 8:49 pm
MLI
-
CHA
6h 35m
1 stop
$309United Airlines
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 $380 on average. Morning departures are around 4% 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 $329, 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 Saturdays 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$105
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 23% 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 $308 one-way - $311 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.
7.9
DeltaOverall score based on 8404 reviews
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
7.8Comfort
Airline reviews

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

2.0 MediocreAnonymous, Jun 2026
RDU - LGA
Read more Delta reviews

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

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.

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

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!

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

Information on your arrival and departure airports