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$54+ Cheap flights from Austin (AUS) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Austin to Illinois

Cheapest flights from Austin to Illinois
Explore the most affordable flight options available from Austin to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Frontier deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:49 pmAUS - ORD
Nonstop2h 57mFrontier
Mon 1/57:25 amORD - AUS
Nonstop2h 50mFrontier
Deal found 12/10$160
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:49 pmAUS - ORD
Nonstop2h 57mMultiple Airlines
Tue 1/63:26 pmORD - AUS
1 stop9h 32mMultiple Airlines
Deal found 12/10$164
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:20 pmAUS - ORD
Nonstop2h 51mUnited Airlines
Thu 1/19:00 amORD - AUS
Nonstop3h 03mUnited Airlines
Deal found 12/11$179
This Kiwi.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:30 amAUS - ORD
1 stop17h 32mMultiple Airlines
Wed 1/147:20 amORD - AUS
1 stop14h 15mMultiple Airlines
Deal found 12/11$180
This Kiwi.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:30 amAUS - ORD
1 stop17h 32mMultiple Airlines
Sat 1/176:02 pmORD - AUS
1 stop16h 55mMultiple Airlines
Deal found 12/11$183
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amAUS - ORD
1 stop8h 21mMultiple Airlines
Mon 1/57:25 amORD - AUS
Nonstop2h 50mMultiple Airlines
Deal found 12/10$188
This Southwest deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:20 pmAUS - MDW
1 stop5h 15mSouthwest
Thu 1/18:15 amMDW - AUS
Nonstop2h 50mSouthwest
Deal found 12/11$189
This Booking.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amAUS - ORD
1 stop8h 21mSpirit Airlines
Mon 1/53:26 pmORD - AUS
1 stop9h 32mSpirit Airlines
Deal found 12/10$197
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:49 pmAUS - ORD
Nonstop2h 57mMultiple Airlines
Mon 1/53:26 pmORD - AUS
1 stop9h 32mMultiple Airlines
Deal found 12/10$199
This Southwest deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/252:40 pmAUS - MDW
Nonstop2h 35mSouthwest
Tue 1/68:10 amMDW - AUS
Nonstop2h 55mSouthwest
Deal found 12/11$208
This Frontier deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:03 amAUS - MDW
1 stop12h 55mFrontier
Mon 1/58:15 amMDW - AUS
1 stop9h 00mFrontier
Deal found 12/11$264
This Trip.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:54 pmAUS - STL
1 stop19h 08mFrontier
Mon 12/224:27 pmSTL - AUS
1 stop15h 41mFrontier
Deal found 12/10$264

Find flight deals from Austin to Illinois

Keep the following information in mind while searching for Austin to Illinois flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$120
(Kiwi.com)

One-way from

$54
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$290

Good round-trip deal

$225 or less

Good one-way deal

$123 or less
Provider with most accurate pricing for Austin Bergstrom-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Austin Bergstrom-Chicago (CHI) flights.
Search Deals
From Austin Bergstrom to Illinois
Search Deals
One-way flight from Austin Bergstrom to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Austin Bergstrom to Illinois.
Search Deals
Price to beat on a one-way flight from Austin Bergstrom to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Austin to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Austin to Illinois that are best for you.

Fly from

Austin

Fly to

Illinois

Route

Depart

Return

Price

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Tue 1/13

7:25 am-9:03 pm

1 stop13h 38m

Chicago O'Hare Intl

Fri 1/16

8:43 pm-10:34 am

1 stop13h 51m

$142

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Tue 1/13

7:25 am-11:46 pm

1 stop16h 21m

Chicago O'Hare Intl

Fri 1/16

4:31 pm-7:35 pm

Nonstop3h 04m

$154

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Fri 1/23

6:30 am-9:20 am

Nonstop2h 50m

Chicago O'Hare Intl

Mon 1/26

7:40 pm-10:47 pm

Nonstop3h 07m

$197

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Wed 1/14

12:48 pm-6:32 pm

1 stop5h 44m

Chicago Midway

Sat 1/17

1:28 pm-8:44 pm

1 stop7h 16m

$199

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 1/7

5:30 am-11:05 am

1 stop5h 35m

Lambert-St Louis

Wed 1/14

6:00 am-1:57 pm

1 stop7h 57m

$207

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Sat 1/10

5:30 am-10:32 am

1 stop5h 02m

Chicago Midway

Mon 1/12

1:28 pm-8:32 pm

1 stop7h 04m

$208

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Wed 1/7

5:30 am-10:27 am

1 stop4h 57m

Chicago Midway

Wed 1/14

1:28 pm-8:32 pm

1 stop7h 04m

$209

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Fri 1/16

6:25 am-8:55 am

Nonstop2h 30m

Chicago Midway

Sun 1/18

8:10 am-11:05 am

Nonstop2h 55m

$213

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Fri 1/23

10:45 am-1:10 pm

Nonstop2h 25m

Chicago Midway

Mon 1/26

8:10 am-11:05 am

Nonstop2h 55m

$213

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Fri 1/23

7:25 am-12:15 pm

1 stop4h 50m

Chicago O'Hare Intl

Mon 1/26

2:15 pm-8:50 pm

1 stop6h 35m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 60 results
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Best time to book a flight from Austin to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Austin with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Austin to Illinois?

Currently, March is the cheapest month in which you can book a flight from Austin to Illinois (average of $58). Flying from Austin to Illinois in February is currently the most expensive (average of $160). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from AUS to IL?

Find hourly flight availability from Austin to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 44% on flights from Austin to Illinois by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Austin to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Austin to Illinois flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Austin to Illinois

Explore weekly flight availability from Austin to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 12, 2025.

The most flights from AUS to USIL are scheduled on a Thursday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated December 12, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Austin to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
8,179 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
5.8
Fair
3,084 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from Austin to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Austin to Illinois?

    Austin Bergstrom (AUS), located 7.5 mi from the city center, is the airport you fly out of when you book flights from Austin to Illinois.

  • How long is the flight from Austin to Illinois?

    Airlines like Spirit Airlines, United Airlines, and Delta fly from Austin to Illinois in about 2h 50m. The time it takes to get you to your destination can typically vary by up to 10h 48m. Austin and Illinois are separated by a distance of 978 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Austin to Illinois one-way?

    One-way options have recently been found by users for as low as $40 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $69 and American Airlines from $71 one-way.

  • What are the most popular routes from Austin to Illinois?

    Most travelers choose Austin Bergstrom - Chicago O'Hare Intl, Austin Bergstrom - Chicago Midway or Austin Bergstrom - Lambert-St Louis when deciding on the best route from Austin to Illinois.

  • What are the most reliable airlines from Austin to Illinois?

    Consider ANA (84%), Qatar Airways (84%) or Royal Jordanian (80%) when booking your flight. These represent the most reliable airlines when flying from Austin to Illinois.

  • What are the cheapest flights from Austin to Illinois?

    Looking for the cheapest flight from Austin to Illinois? While on average our users pay $765, our data indicates the cheapest price to be $64. The most popular route (Austin Bergstrom - Chicago O'Hare Intl), is priced around $95.

  • Can I find deals for flights from Austin to Illinois that include hotel bookings?

    Yes. In addition to deals on Austin to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Austin to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Austin to Illinois.

  • Can I find deals for business class flights from Austin to Illinois?

    Yes. Cheapflights offers flight deals from Austin to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Austin to Illinois?

    Currently, March is the cheapest month in which you can book a flight from Austin to Illinois (average of $58). Flying from Austin to Illinois in February is currently the most expensive (average of $160). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Austin to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Austin to Illinois

Discover the top 4 airlines that operate flights from Austin to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$70Average$249FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$149Average$292FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$160Average$423FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$187Average$367FlexibilityNo cancel feeOn-time69%

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