$59 Find Cheap Flights from Austin 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 Austin to Illinois departing on 5/28. 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.
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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 Austin 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 Austin to Illinois, as well as popular online travel agencies
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Best Illinois Flight Deals from Austin

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

Chicago
Chicago1 stop$138
Moline
Moline1 stop$199
Peoria
Peoria1 stop$224
Bloomington
Bloomington1 stop$497
Champaign
Champaign1 stop$506
Springfield
Springfield1 stop$505
St. Louis
St. Louis1 stop$198

Cheap Flight Deals from Austin to Illinois (AUS-USIL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Austin 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.

Recent round-trip flight deals from Austin to Illinois

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Austin to Illinois.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
7:52 pm - 8:04 amAUS-ORD
12h 12m1 stop
2:31 pm - 5:29 pmORD-AUS
2h 58mnonstop
Fri, Apr 18 - Sun, Apr 20
10:49 am - 1:43 pmAUS-ORD
2h 54mnonstop
7:15 am - 10:05 amORD-AUS
2h 50mnonstop
$142Frontier
Find Deal
Wed, Jul 9 - Wed, Jul 23
9:20 pm - 6:33 amAUS-ORD
9h 13m1 stop
5:36 am - 5:39 pmORD-AUS
12h 03m1 stop
$151Spirit Airlines
Find Deal
Sun, Apr 13 - Tue, Apr 15
11:25 am - 7:06 pmAUS-ORD
7h 41m1 stop
5:36 am - 5:39 pmORD-AUS
12h 03m1 stop
$154Spirit Airlines
Find Deal
Sat, Apr 12 - Tue, Apr 15
6:33 pm - 9:24 pmAUS-ORD
2h 51mnonstop
7:23 pm - 10:11 pmORD-AUS
2h 48mnonstop
$159American Airlines
Find Deal
Sat, Jul 19 - Sat, Aug 2
7:45 pm - 10:15 pmAUS-MDW
2h 30mnonstop
1:20 pm - 4:00 pmMDW-AUS
2h 40mnonstop
$159Southwest
Find Deal
Wed, May 28 - Sat, May 31
6:00 am - 8:47 amAUS-ORD
2h 47mnonstop
5:03 pm - 7:50 pmORD-AUS
2h 47mnonstop
$168American Airlines
Find Deal
Wed, May 21 - Sat, May 24
2:50 pm - 5:25 pmAUS-MDW
2h 35mnonstop
2:50 pm - 5:30 pmMDW-AUS
2h 40mnonstop
$177Southwest
Find Deal
Tue, Apr 29 - Tue, May 6
12:45 pm - 3:36 pmAUS-ORD
2h 51mnonstop
7:56 pm - 11:00 pmORD-AUS
3h 04mnonstop
$217United Airlines
Find Deal
Wed, Apr 23 - Wed, Apr 23
5:41 pm - 10:03 pmAUS-STL
4h 22m1 stop
6:30 am - 12:01 pmSTL-AUS
5h 31m1 stop
$228United Airlines
Find Deal
Mon, May 5 - Tue, May 6

KAYAK's insights & trends for Austin to Illinois flights

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

What is the cheapest Austin to Illinois flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Austin to Illinois.
The cheapest ticket to Illinois from Austin found in the last 72 hours was to Chicago, at $113 round-trip. The most popular route is from Austin (AUS) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $113.

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

The average price for all round-trip flights from Austin 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 at night, when round-trip flights cost $399 on average. Morning departures are around 37% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $685.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Austin 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 Austin to Illinois is April, when tickets cost $264 (return) on average. On the other hand, the most expensive months are December and October, when the average cost of round-trip tickets is $398 and $374 respectively.

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

The average price of all round-trip flights from Austin to Illinois clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Illinois on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Austin to Illinois. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

How far in advance should I book a flight from Austin 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 Austin 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 Austin to Illinois, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low season

January

High season

July

Cheapest flight

$59
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Austin to Chicago O'Hare Airport

FAQs - booking Illinois flights

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Austin 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 Austin 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 Austin 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 Austin 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 Austin to Illinois 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

  • Looking for a cheap flight? 25% of our users found tickets from Austin to the following destinations at these prices or less: Chicago $139 one-way - $266 round-trip

Top 5 airlines serving from Austin to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Austin 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 Austin 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.
8.0
SouthwestOverall score based on 4275 reviews
8.1Comfort
7.1Food
7.6Entertainment
8.7Crew
8.2Boarding
Airline reviews

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

8.0 ExcellentStephen, Feb 2025AUS - SAN
Read more Southwest reviews

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Flight was awfully bumpy and landing was a bit jolting. I was in the restroom when snacks and drinks were served and was not asked if i wanted any. I had to ask for water finally.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

The last 30 min or so, they put the heat on full. We thought we were being basted.

I like that it was on time and the staff was friendly.

No space for our carryon and needed to check at plane before boarding !

Flight was ok. Boarding wasn’t fun. Flights were delayed by 12 minutes on each leg.

The plane wasn’t full, so we got the best seats

The flight was semi-full with enough space to spread out. Wonderful, smooth, and quick flight.

We boarded the flight and set two and a half hours on the jetway. Would have been better if they had not boarded us at all. Plane was hot and it was limited ability to access the restrooms or get a drink of water. Very unpleasant experience

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

Food choices were very limited. Taste of the dishes was average.

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

They canceled our flight and left us stranded to figure it out

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Crew professional. Easy bag drop off. On time. Good entertainment.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

Per usual, flight status, staff courtesy and professionalism were excellent

Everything was on time, we arrived early, everything worked well.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

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

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

Terrible-extreme delay with very little communication, plane was overfull, luggage was returned on baggage claim in filthy condition.

Lower cost is the reason to fly Spirit. Should give free baggage with credit card.

Very difficult. Flew out on Dec 24th and it was a mess. They know it is going to be the busiest time of the year and they had no organization. Finally they called for people going on certiam flights so they could get them thru thw line then we had to rush to our gate to get in li e to board.We missed our flight do to being stuck at the border of Mexico. They would not work with us to make an affordable price so we had to wait a day with no where to go and pay 280 more for our flights. I would think that a complimentary drink would be nice. But we had to pay 4.49 for a coke. Not an overall good experience

I’ve now flown Spirit a few times and while the general perception of Spirit I feel is poor, I’ve had a great experience each time. They do charge extra for everything but you should know that going in

Horrible. Take off was delayed by an hour. They were letting people board d the plane right before takeoff. I was delayed an hour when I arrived and late for my meeting. Spirit is NEVER on time.

The flight landed with a delay and we had to wait almost an hour to be off boarded. So typical of spirit.

The gate employees and the flight crew were friendly and professional. Afterboarding we waited 20 minutes for another flight; a complimentary beverage would have ben appreciated for the inconvenience.

You get what you pay for, but those tickets weren't cheap, so I expected better, but Spirit is just one of those airlines.

Cancelled the return flight moments before boarding, horrible customer service in assisting with any rebooking. Never again will I fly Spirit.

It was on time, no issues, everyone was courteous and of course, affordable.

Landing in terminal 2, but my luggage is terminal 3. We (and others) were looking for it in terminal 1. We probably missed the crew broadcast, but the communication could have been clearer for non native (or elderly) passengers.

I chose the seats when booked the flight and paid for them. However after checking in I found we were assigned different seats!

Bag should not be so much money. This is how Frontier takes advantage of customers

The plane was comfortable. The time to board was way too slow and very unorganized! The crew was not as friendly as normally. The was not a single time that they offered water nor anything!!!

They switched my flight to Spirit, Never using Kayak again,

i was denied boarding, even though i had an assigned seat, checked in on line and was at airport early. Then they refused to fully refund the the fair and replacement fair because they claimed it was "no show/denied boarding". I will never fly this airline again

I was not permitted on my flight and had to purchase another flight ticket to Las Vegas.

This was a full flight and I was in Zone 1, however upon boarding, several other zones went in ahead of me, leaving no overhead cabin space near my seat. This created a challenging disembarkment process.

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

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

Information on your arrival and departure airports

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