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$57+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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 January 27, 2026.

This Super.com deal was found by Cheapflights users on 1/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/211:59 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Thu 2/58:00 am
ORD
-
AUS
Nonstop3h 04m
Frontier
Deal found 1/26$88
This Trip.com deal was found by Cheapflights users on 1/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:59 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Mon 2/98:00 am
ORD
-
AUS
Nonstop3h 04m
Frontier
Deal found 1/25$89
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Tue 2/247:15 am
AUS
-
ORD
1 stop11h 56m
Multiple Airlines
Mon 3/95:09 pm
ORD
-
AUS
Nonstop3h 04m
Multiple Airlines
Deal found 1/26$91
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Mon 2/211:59 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Fri 2/68:25 am
ORD
-
AUS
Nonstop3h 04m
Frontier
Deal found 1/26$92
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:59 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Sun 2/87:00 am
ORD
-
AUS
Nonstop3h 04m
Frontier
Deal found 1/26$93
This Super.com deal was found by Cheapflights users on 1/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/612:24 pm
AUS
-
ORD
Nonstop2h 46m
Frontier
Sun 2/87:00 am
ORD
-
AUS
Nonstop3h 04m
Frontier
Deal found 1/26$97
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 2/511:59 am
AUS
-
ORD
Nonstop2h 46m
Multiple Airlines
Wed 2/117:20 am
ORD
-
AUS
1 stop14h 15m
Multiple Airlines
Deal found 1/25$104
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/99:08 pm
AUS
-
ORD
Nonstop2h 46m
Multiple Airlines
Wed 3/117:00 am
ORD
-
AUS
1 stop13h 53m
Multiple Airlines
Deal found 1/27$105
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
Tue 2/107:25 am
AUS
-
ORD
1 stop13h 38m
Spirit Airlines
Wed 2/117:20 am
ORD
-
AUS
1 stop14h 15m
Spirit Airlines
Deal found 1/25$108
This Trip.com deal was found by Cheapflights users on 1/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/37:15 am
AUS
-
ORD
1 stop11h 56m
Multiple Airlines
Mon 3/95:09 pm
ORD
-
AUS
Nonstop3h 04m
Multiple Airlines
Deal found 1/25$110
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:30 am
AUS
-
STL
1 stop7h 23m
Frontier
Sat 2/283:49 pm
STL
-
AUS
1 stop18h 02m
Frontier
Deal found 1/26$128
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Fri 2/273:30 pm
AUS
-
STL
1 stop15h 21m
Multiple Airlines
Mon 3/23:49 pm
STL
-
AUS
1 stop24h 15m
Multiple Airlines
Deal found 1/26$136

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$91
(Kiwi.com)

One-way from

$57
(Trip.com)

Popular in

February

Cheapest in

January

Average price

$217

Good round-trip deal

$236 or less

Good one-way deal

$144 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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 27, 2026.
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

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 2/25

8:30 am-3:53 pm

1 stop7h 23m

Lambert-St Louis

Sat 2/28

3:49 pm-9:51 am

1 stop18h 02m

$128

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Fri 2/27

10:17 am-6:51 am

1 stop20h 34m

Lambert-St Louis

Tue 3/3

3:49 pm-4:04 pm

1 stop24h 15m

$136

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Tue 3/31

8:27 pm-11:25 pm

1 stop26h 58m

Lambert-St Louis

Mon 4/6

4:54 pm-7:32 pm

1 stop26h 38m

$156

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Wed 2/25

7:15 am-10:27 pm

2 stops15h 12m

Lambert-St Louis

Sat 2/28

12:36 pm-9:51 am

1 stop21h 15m

$168

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Tue 2/24

7:00 am-9:47 am

Nonstop2h 47m

Chicago O'Hare Intl

Sat 2/28

9:05 am-12:07 pm

Nonstop3h 02m

$179

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Tue 3/3

2:00 pm-4:30 pm

Nonstop2h 30m

Chicago Midway

Mon 3/9

9:40 pm-12:30 am

Nonstop2h 50m

$185

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Wed 2/25

3:50 pm-6:37 pm

Nonstop2h 47m

Chicago O'Hare Intl

Mon 3/9

7:45 pm-10:52 pm

Nonstop3h 07m

$185

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Tue 2/17

7:00 am-9:47 am

Nonstop2h 47m

Chicago O'Hare Intl

Wed 3/4

10:55 am-2:01 pm

Nonstop3h 06m

$189

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Wed 2/18

3:50 pm-6:37 pm

Nonstop2h 47m

Chicago O'Hare Intl

Wed 3/4

10:55 am-2:01 pm

Nonstop3h 06m

$189

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Wed 4/22

2:00 pm-4:35 pm

Nonstop2h 35m

Chicago Midway

Mon 4/27

9:30 pm-12:10 am

Nonstop2h 40m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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, January is the cheapest month in which you can book a flight from Austin to Illinois (average of $56). Flying from Austin to Illinois in July is currently the most expensive (average of $140). 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 January 27, 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 45% 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 January 24, 2026.

Travelers seeking maximum savings on their Austin to Illinois flight should consider departing on Thursday evenings when fares are most often at their lowest. Monday 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 January 27, 2026.

The most flights from AUS to USIL are scheduled on a Monday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (14 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 January 27, 2026.
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
4,268 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

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
4,268 reviews
Southwest
8.0
Very good
4,268 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

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
9,206 reviews
Southwest
8.0
Very good
4,268 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

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
11,198 reviews
Southwest
8.0
Very good
4,268 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

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
8,385 reviews
Southwest
8.0
Very good
4,268 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

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
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,268 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

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 Frontier, United Airlines, and Southwest fly from Austin to Illinois in about 2h 30m. The time it takes to get you to your destination can typically vary by up to 4h 53m. Austin and Illinois are separated by a distance of 972 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 $39 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 Royal Jordanian (85%), ANA (84%) or Qatar Airways (83%) 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 $891, our data indicates the cheapest price to be $63. The most popular route (Austin Bergstrom - Chicago O'Hare Intl), is priced around $97.

  • 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, January is the cheapest month in which you can book a flight from Austin to Illinois (average of $56). Flying from Austin to Illinois in July is currently the most expensive (average of $140). 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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$222FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$143Average$278FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$159Average$432FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$178Average$357FlexibilityNo cancel feeOn-time69%

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