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$79+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
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 julio 29, 2025.

Round-trip from

$157
(Southwest)

One-way from

$79
(Southwest)

Popular in

December

Cheapest in

April

Average price

$274

Good round-trip deal

$221 or less

Good one-way deal

$144 or less
From Austin Bergstrom to Illinois
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One-way flight from Austin Bergstrom to Illinois
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Highest demand for flights based on searches. 16% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 29, 2025.

This Southwest deal was found by Cheapflights users on 7/29. 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.
jue. 8/2812:45 pmAUS - STL
Nonstop2h 10mSouthwest
jue. 9/410:05 amSTL - AUS
Nonstop2h 00mSouthwest
Deal found 7/29$157
This Priceline deal was found by Cheapflights users on 7/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/2210:03 amAUS - ORD
Nonstop2h 54mFrontier
lun. 8/256:10 amORD - AUS
Nonstop3h 08mFrontier
Deal found 7/28$163
This Southwest deal was found by Cheapflights users on 7/28. 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.
mié. 8/276:25 amAUS - MDW
Nonstop2h 35mSouthwest
sáb. 8/308:25 amMDW - AUS
Nonstop2h 35mSouthwest
Deal found 7/28$169
This CheapOair deal was found by Cheapflights users on 7/29. 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.
vie. 8/157:15 amAUS - ORD
1 stop11h 52mSpirit Airlines
sáb. 8/1611:36 amORD - AUS
1 stop13h 23mSpirit Airlines
Deal found 7/29$169
This Orbitz deal was found by Cheapflights users on 7/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/511:27 amAUS - ORD
Nonstop2h 53mMultiple Airlines
lun. 9/811:48 amORD - AUS
1 stop11h 14mMultiple Airlines
Deal found 7/27$175
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/145:00 amAUS - STL
1 stop3h 53mAmerican Airlines
sáb. 10/188:49 amSTL - AUS
1 stop5h 37mAmerican Airlines
Deal found 7/27$177
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/1710:45 amAUS - STL
1 stop5h 20mDelta
mié. 9/2411:04 amSTL - AUS
1 stop4h 51mDelta
Deal found 7/29$187
This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/195:29 pmAUS - MDW
1 stop5h 51mFrontier
dom. 9/2110:13 amMDW - AUS
1 stop7h 12mFrontier
Deal found 7/27$195
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/297:00 amAUS - STL
1 stop26h 11mFrontier
mié. 7/307:29 pmSTL - AUS
1 stop28h 15mFrontier
Deal found 7/27$205
This Southwest deal was found by Cheapflights users on 7/29. 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.
sáb. 8/2311:40 amAUS - ORD
Nonstop2h 45mSouthwest
mar. 8/264:20 pmORD - AUS
Nonstop2h 50mSouthwest
Deal found 7/29$208
This CheapOair deal was found by Cheapflights users on 7/27. 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.
lun. 9/89:23 pmAUS - STL
1 stop11h 43mMultiple Airlines
jue. 9/1110:35 amSTL - AUS
1 stop12h 27mMultiple Airlines
Deal found 7/27$212
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/166:00 amAUS - ORD
Nonstop2h 49mAmerican Airlines
mar. 9/238:31 amORD - AUS
Nonstop2h 41mAmerican Airlines
Deal found 7/27$217

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 julio 29, 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

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

jue. 8/28

12:45 pm-2:55 pm

Nonstop2h 10m

Lambert-St Louis

jue. 9/4

10:05 am-12:05 pm

Nonstop2h 00m

$157

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

vie. 8/22

10:03 am-12:57 pm

Nonstop2h 54m

Chicago O'Hare Intl

lun. 8/25

6:10 am-9:18 am

Nonstop3h 08m

$163

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

vie. 8/15

7:15 am-7:07 pm

1 stop11h 52m

Chicago O'Hare Intl

sáb. 8/16

11:36 am-12:59 am

1 stop13h 23m

$169

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

mié. 8/27

6:25 am-9:00 am

Nonstop2h 35m

Chicago Midway

sáb. 8/30

8:25 am-11:00 am

Nonstop2h 35m

$169

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

vie. 9/5

11:27 am-2:20 pm

Nonstop2h 53m

Chicago O'Hare Intl

lun. 9/8

11:48 am-11:02 pm

1 stop11h 14m

$175

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

mar. 10/14

5:00 am-8:53 am

1 stop3h 53m

Lambert-St Louis

sáb. 10/18

8:49 am-2:26 pm

1 stop5h 37m

$177

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

mié. 9/17

10:45 am-4:05 pm

1 stop5h 20m

Lambert-St Louis

mié. 9/24

11:04 am-3:55 pm

1 stop4h 51m

$187

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

vie. 9/19

5:29 pm-11:20 pm

1 stop5h 51m

Chicago Midway

dom. 9/21

10:13 am-5:25 pm

1 stop7h 12m

$195

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

sáb. 8/23

11:40 am-2:25 pm

Nonstop2h 45m

Chicago O'Hare Intl

mar. 8/26

4:20 pm-7:10 pm

Nonstop2h 50m

$208

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

sáb. 8/23

7:44 am-9:11 am

1 stop25h 27m

Lambert-St Louis

dom. 8/24

6:47 pm-1:09 pm

1 stop18h 22m

$208

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 55 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, August is the cheapest month in which you can book a flight from Austin to Illinois (average of $245). Flying from Austin to Illinois in March is currently the most expensive (average of $321). 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 julio 29, 2025.

When flying from Austin to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 julio 29, 2025.

The most flights from AUS to USIL are scheduled on a Monday (39 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 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 julio 29, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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
4,238 reviews

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

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.
Delta
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
8,896 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

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.
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

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.

  • 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 $79 on Southwest. Other airlines that offer cheap prices include Spirit Airlines from $86 and Frontier from $87 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 Envoy Air (95%), Japan Airlines (87%) or ANA (86%) 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 $1,913, our data indicates the cheapest price to be $79. The most popular route (Austin Bergstrom - Chicago O'Hare Intl), is priced around $138.

  • 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, August is the cheapest month in which you can book a flight from Austin to Illinois (average of $245). Flying from Austin to Illinois in March is currently the most expensive (average of $321). 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 6 airlines flying from Austin to Illinois

Discover the top 6 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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$225FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$103Average$216FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$162Average$339FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$166Average$423FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$198Average$403FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$391FlexibilityNo cancel feeOn-timeN/A

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