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$61+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from Austin to Illinois

Keep the following information in mind while searching for Austin to Illinois flight deals. Data was last updated October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$119
(Mytrip)

One-way from

$61
(Frontier)

Popular in

December

Cheapest in

September

Average price

$285

Good round-trip deal

$248 or less

Good one-way deal

$155 or less
Provider with most accurate pricing for Austin Bergstrom-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Austin Bergstrom-Chicago (CHI) flights.
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From Austin Bergstrom to Illinois
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One-way flight from Austin Bergstrom to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Austin Bergstrom to Illinois.
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Price to beat on a one-way flight from Austin Bergstrom to Illinois.
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Find 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 October 28, 2025.

This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:45 amAUS - STL
1 stop25h 22mFrontier
Thu 11/137:45 pmSTL - AUS
1 stop13h 57mFrontier
Deal found 10/27$119
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Mon 11/1011:15 amAUS - ORD
Nonstop2h 49mMultiple Airlines
Sat 11/153:26 pmORD - AUS
1 stop7h 23mMultiple Airlines
Deal found 10/25$133
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Sat 12/65:30 amAUS - ORD
1 stop14h 31mMultiple Airlines
Sun 12/75:13 pmORD - AUS
Nonstop2h 50mMultiple Airlines
Deal found 10/26$136
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Thu 11/273:35 pmAUS - ORD
1 stop8h 35mFrontier
Mon 12/15:19 pmORD - AUS
Nonstop2h 59mFrontier
Deal found 10/27$137
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Mon 12/2211:00 amAUS - ORD
Nonstop2h 57mFrontier
Mon 12/297:25 amORD - AUS
Nonstop2h 50mFrontier
Deal found 10/25$139
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Thu 12/186:45 amAUS - STL
1 stop27h 17mFrontier
Mon 12/2210:40 amSTL - AUS
1 stop21h 28mFrontier
Deal found 10/25$139
This Frontier deal was found by Cheapflights users on 10/27. 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 11/205:07 pmAUS - ORD
1 stop7h 01mFrontier
Mon 11/245:19 pmORD - AUS
Nonstop2h 59mFrontier
Deal found 10/27$141
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Mon 11/175:56 pmAUS - ORD
1 stop6h 15mMultiple Airlines
Wed 11/1912:37 pmORD - AUS
2 stops10h 12mMultiple Airlines
Deal found 10/27$142
This CheapOair deal was found by Cheapflights users on 10/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:00 amAUS - MDW
1 stop5h 30mFrontier
Mon 11/106:15 amMDW - AUS
1 stop10h 46mFrontier
Deal found 10/27$143
This Frontier deal was found by Cheapflights users on 10/27. 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.
Wed 11/57:45 amAUS - ORD
1 stop7h 54mFrontier
Mon 11/108:26 amORD - AUS
1 stop7h 16mFrontier
Deal found 10/27$143
This Frontier deal was found by Cheapflights users on 10/27. 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 11/206:45 amAUS - STL
1 stop12h 13mFrontier
Fri 12/512:07 pmSTL - AUS
1 stop7h 36mFrontier
Deal found 10/27$143
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:59 amAUS - MDW
1 stop11h 59mFrontier
Sun 12/712:18 pmMDW - AUS
1 stop11h 56mFrontier
Deal found 10/26$144

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 October 28, 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 - MDW

AUSMDW

Austin Bergstrom

Wed 12/24

2:10 pm-7:05 pm

1 stop4h 55m

Chicago Midway

Wed 12/31

8:20 pm-11:05 pm

Nonstop2h 45m

$161

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Sat 12/6

3:53 pm-6:38 pm

Nonstop2h 45m

Chicago O'Hare Intl

Sun 12/7

8:59 am-12:04 pm

Nonstop3h 05m

$168

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Wed 11/12

7:45 am-11:30 am

1 stop27h 45m

Chicago Midway

Sun 11/16

12:30 pm-12:32 am

1 stop12h 02m

$171

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Mon 12/1

10:40 pm-1:05 am

Nonstop2h 25m

Chicago Midway

Wed 12/3

12:55 pm-3:40 pm

Nonstop2h 45m

$174

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Tue 1/13

10:45 am-1:10 pm

Nonstop2h 25m

Chicago Midway

Sun 1/18

6:00 am-11:00 am

1 stop5h 00m

$175

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Sat 1/17

6:10 am-1:30 pm

1 stop7h 20m

Chicago O'Hare Intl

Mon 1/19

2:15 pm-9:50 pm

1 stop7h 35m

$194

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Thu 12/25

8:20 am-2:40 pm

1 stop6h 20m

Chicago Midway

Thu 1/1

6:00 am-11:14 am

1 stop5h 14m

$197

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Mon 12/15

3:20 pm-5:25 pm

Nonstop2h 05m

Lambert-St Louis

Tue 12/30

10:45 pm-12:55 am

Nonstop2h 10m

$197

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Mon 11/17

1:50 pm-7:20 pm

1 stop5h 30m

Chicago Midway

Mon 11/24

9:50 pm-12:35 am

Nonstop2h 45m

$200

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Sun 1/25

5:20 am-12:48 pm

1 stop7h 28m

Chicago Midway

Sat 2/21

2:00 pm-9:23 pm

1 stop7h 23m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

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 $59). Flying from Austin to Illinois in January is currently the most expensive (average of $186). 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 October 28, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 42% 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. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Austin to Illinois?

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 October 28, 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
8.0
Very good
4,240 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

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
8.0
Very good
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

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
9,001 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

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
11,032 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

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
8,116 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

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
3,124 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

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 Southwest, United Airlines, and Frontier fly from Austin to Illinois in about 2h 45m. The time it takes to get you to your destination can typically vary by up to 25h. 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 $76 on Southwest. Other airlines that offer cheap prices include United Airlines from $76 and Delta from $104 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 (92%), Japan Airlines (87%) or Southwest (85%) 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 $1,036, our data indicates the cheapest price to be $70. The most popular route (Austin Bergstrom - Chicago O'Hare Intl), is priced around $112.

  • 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 $59). Flying from Austin to Illinois in January is currently the most expensive (average of $186). 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.

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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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$74Average$242FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$137Average$412FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$158Average$314FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$194Average$386FlexibilityNo cancel feeOn-time69%

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