$132 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 7/23. 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$223
Moline
Moline1 stop$339
Peoria
Peoria1 stop$319
St. Louis
St. Louis1 stop$297
Chicago
Chicago1 stop$223
Moline
Moline1 stop$339
Peoria
Peoria1 stop$319
St. Louis
St. Louis1 stop$297

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

Sun, Jul 12 - Wed, Jul 15
Multiple Airlines Logo
8:59 am - 12:15 pm
CHA
-
ORD
28h 16m
1 stop
Multiple Airlines Logo
8:05 am - 8:09 am
ORD
-
CHA
23h 04m
1 stop
$223Multiple Airlines
Sun, Jul 12 - Wed, Jul 15
Multiple Airlines Logo
8:59 am - 12:15 pm
CHA
-
ORD
28h 16m
1 stop
Multiple Airlines Logo
8:05 am - 8:09 am
ORD
-
CHA
23h 04m
1 stop
$224Multiple Airlines
Fri, Jul 24 - Sun, Jul 26
United Airlines Logo
6:00 am - 6:59 am
CHA
-
ORD
1h 59mnonstop
United Airlines Logo
6:55 am - 9:44 am
ORD
-
CHA
1h 49mnonstop
$249United Airlines
Fri, Jul 24 - Sun, Jul 26
American Airlines Logo
4:33 pm - 10:00 pm
CHA
-
ORD
6h 27m
1 stop
American Airlines Logo
9:02 pm - 11:54 pm
ORD
-
CHA
1h 52mnonstop
$259American Airlines
Fri, Sep 4 - Mon, Sep 7
American Airlines Logo
5:52 pm - 7:14 pm
CHA
-
ORD
2h 22mnonstop
American Airlines Logo
8:56 pm - 11:46 pm
ORD
-
CHA
1h 50mnonstop
$264American Airlines
Tue, Jul 21 - Mon, Jul 27
Delta Logo
7:20 pm - 10:15 pm
CHA
-
MDW
3h 55m
1 stop
Delta Logo
6:00 am - 12:22 pm
MDW
-
CHA
5h 22m
1 stop
$269Delta
Tue, Jul 21 - Thu, Aug 6
Delta Logo
3:05 pm - 6:29 pm
CHA
-
ORD
4h 24m
1 stop
Delta Logo
3:25 pm - 8:44 pm
ORD
-
CHA
4h 19m
1 stop
$269Delta
Fri, Jul 10 - Sun, Jul 12
United Airlines Logo
6:00 am - 6:59 am
CHA
-
ORD
1h 59mnonstop
United Airlines Logo
6:55 am - 9:44 am
ORD
-
CHA
1h 49mnonstop
$279United Airlines
Thu, Jul 9 - Mon, Jul 13
Allegiant Air Logo
2:49 pm - 7:49 am
CHA
-
RFD
18h 00m
1 stop
Allegiant Air Logo
8:39 am - 9:34 am
RFD
-
CHA
23h 55m
1 stop
$449Allegiant 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
$494Allegiant 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 $378 on average. Morning departures are around 5% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally at night, which is peak travel time and where the average cost of a ticket is $506.

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 $336, 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 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonDecember
Cheapest flight$132
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 8% 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.

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 $275 one-way - $329 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 8451 reviews
7.8Entertainment
7.8Comfort
8.1Boarding
7.2Food
8.5Crew
Airline reviews

It was as good as it could be. Flying is not a pleasant experience these days.

8.0 ExcellentMark, Jun 2026
LAX - ORD
Read more Delta reviews

It was as good as it could be. Flying is not a pleasant experience these days.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

Got on the plane and sat there for an hour before departure.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

Cramped seating for me. Luckily it wasn’t a long flight

5 hour delay. They blamed the weather but it was the computer issues they had been dealing with for days.

I usually have a positive experience with Delta. Complimentary upgrades are always nice!

The captain was amazing and kept us informed throughout that there would be some rough air. The flight also got delayed but we were able to actually leave on time, which was great.

The staff did not do a good job of getting everyone boarded quickly, so we missed our take off window and had to sit on the tarmac for 20+ min waiting for our turn. The plan was old. Pockets on the back of seats were torn and tearing off. One of the attendants was rude-she would ask a question but he walking away before you finished answering so she kept getting our drink orders wrong.

1 flight cancelled Had to fly out of different city Flight at new departure city was delayed 3 hours causing us to miss connecting flights. By the time we did make it to Prague our luggage did not. Had to wait day and a half for luggage to be delivered. Customer service was not good. Agents did not arrive at gate until 5-10 minutes before boarding

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

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.

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

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

The flight de-boarded after being informed of a 3 hour delay. The gate agent said we could go to lounge. The flight ended up boarding 20 minutes later and I missed it.

It was canceled at the last minute. While I was literally at the airport. Messed my entire trip up.

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?

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.

Not sure the logic of the boarding in Groups. I was loaded first on the aisle. Then the guy in the middle. Then the guy by the window. Constantly holding up the other people boarding behind them with us blocking the aisle and this happened in most of the other rows

Delayed due to no crew. On a major holiday travel day.

Fantastic! If it had not been for a check-in agent in Knoxville I may have not gotten my passes on British Airways. I couldn’t check-in online because British Airways had messed us the info on my tickets to London & Inverness. AA’s was great! British Airways was a continuous series of delays and frustrations.

Pulled out of the gate only to sit in the tarmac for an hour and a half for paperwork. Paperwork. Went back to the gate to refuel.

The arriving flight was a few minutes late, but the gate crew helped to deplane and board our outgoing flight quickly and efficiently. We were able to depart quickly and arrive at ORD almost at the posted time. Great job.

Pros: "The flight didn't last long"
Cons: "There was a lot of turbulence so the flight was a bit bumpy."

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

Information on your arrival and departure airports