$80 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 2/21. 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
Chicagononstop$159
Moline
Moline1 stop$274
Peoria
Peoria1 stop$249
St. Louis
St. Louis1 stop$235
Chicago
Chicagononstop$159
Moline
Moline1 stop$274
Peoria
Peoria1 stop$249
St. Louis
St. Louis1 stop$235

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

Sat, Feb 21 - Sat, Feb 28
American Airlines Logo
7:51 am - 9:02 am
CHA
-
ORD
2h 11mnonstop
American Airlines Logo
6:59 pm - 9:51 pm
ORD
-
CHA
1h 52mnonstop
$159American Airlines
Thu, Feb 26 - Wed, Mar 11
Multiple Airlines Logo
9:23 pm - 11:24 pm
CHA
-
ORD
27h 01m
1 stop
Multiple Airlines Logo
6:36 pm - 4:36 pm
ORD
-
CHA
21h 00m
1 stop
$164Multiple Airlines
Thu, Feb 12 - Sat, Feb 14
American Airlines Logo
6:49 pm - 8:00 pm
CHA
-
ORD
2h 11mnonstop
American Airlines Logo
6:59 pm - 9:51 pm
ORD
-
CHA
1h 52mnonstop
$174American Airlines
Sat, Feb 14 - Wed, Feb 18
Delta Logo
6:03 pm - 10:31 pm
CHA
-
MDW
5h 28m
1 stop
Delta Logo
6:00 am - 1:04 pm
MDW
-
CHA
6h 04m
1 stop
$179Delta
Sat, Feb 14 - Tue, Feb 17
Delta Logo
3:03 pm - 7:19 pm
CHA
-
ORD
5h 16m
1 stop
Delta Logo
6:45 am - 2:04 pm
ORD
-
CHA
6h 19m
1 stop
$179Delta
Thu, Feb 12 - Wed, Feb 18
Multiple Airlines Logo
3:33 pm - 11:24 pm
CHA
-
ORD
8h 51m
1 stop
Multiple Airlines Logo
4:43 pm - 2:43 pm
ORD
-
CHA
21h 00m
1 stop
$183Multiple Airlines
Fri, Feb 13 - Sun, Feb 15
United Airlines Logo
1:15 pm - 2:22 pm
CHA
-
ORD
2h 07mnonstop
United Airlines Logo
9:25 am - 12:16 pm
ORD
-
CHA
1h 51mnonstop
$189United Airlines
Wed, Mar 4 - Sun, Mar 8
United Airlines Logo
5:22 pm - 9:05 pm
CHA
-
STL
4h 43m
1 stop
United Airlines Logo
7:41 am - 1:26 pm
STL
-
CHA
4h 45m
1 stop
$242United Airlines
Thu, Feb 5 - Mon, Feb 9
Allegiant Air Logo
10:52 am - 5:19 pm
CHA
-
RFD
7h 27m
1 stop
Allegiant Air Logo
10:42 am - 9:06 pm
RFD
-
CHA
9h 24m
1 stop
$332Allegiant Air
Sun, May 3 - Thu, May 7
Allegiant Air Logo
10:02 pm - 6:19 pm
CHA
-
RFD
21h 17m
1 stop
Allegiant Air Logo
10:37 am - 9:12 pm
RFD
-
CHA
9h 35m
1 stop
$362Allegiant 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.

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 72 hours was to Chicago, at $189 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 72 hours was $189.

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 $273, 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 January, when tickets cost $249 (return) on average. On the other hand, the most expensive months are April and June, when the average cost of round-trip tickets is $384 and $368 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 4 weeks before departure, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$80
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 14% lower on average.
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.

  • 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 $405 on average. Morning departures are around 1% 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 $410.

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 $305 one-way - $296 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 8094 reviews
7.2Food
8.5Crew
7.8Entertainment
8.1Boarding
7.9Comfort
Airline reviews

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

2.0 MediocreKyle, Jan 2026
GNV - ATL
Read more Delta reviews

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

There was no wifi available on this flight. And there were no screens, no onboard entertainment, no entertainment options at all. It was like travelling in the 1990s again, except without even a main screen for options. Seats, as usual, were tight and uncomfortable.

Good seat comfort ORF to ATL. Bad seat ATL to SEA (terrible lumbar support, hard, ouch)..

Because I was moved to an exit row, the snacks in economy comfort, the selection of snacks was better.

I upgraded to first. Quick and easy boarding. Comfortable seat with power and a nice IPA.

Probably not the fault of Delta but there was delay after delay after delay and I ended up getting home 4 hours later then I should have at 1:30 in the morning

No in flight service, no explanation - FC got service, C+ did not, unsure about Economy. No turbulence to speak of, so I guess another way to cut cost, or promote health and well being of Delta employees? Also, boarding in MEM combined zones, and with overhead space already full on both flights after Zone 2/ Diamond, presents a huge challenge to find a space for a bag. Delta, other than point A to B, is no longer reasonable to fly - very poor experiences, not even taking into account the chastising at the gate and rude crews, across the board.

It would have been better if the flight wasn't delayed by 2.5 hours

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Very bad! They kept delaying my flight and wouldn’t do anything about it

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Little warm on the plane and delayed for an hour

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

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

Information on your arrival and departure airports