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$57+ Cheap flights from Illinois to Austin (AUS)

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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — AUS
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Illinois to Austin

Cheapest flights from Illinois to Austin
Explore the most affordable flight options available from Illinois to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This Priceline deal was found by Cheapflights users on 12/3. 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.
Fri 12/127:25 amORD - AUS
Nonstop2h 50mFrontier
Fri 12/1211:19 amAUS - ORD
Nonstop2h 57mFrontier
Deal found 12/3$124
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/3112:09 pmORD - AUS
1 stop9h 48mMultiple Airlines
Fri 1/97:56 pmAUS - ORD
Nonstop2h 50mMultiple Airlines
Deal found 12/1$127
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/113:47 pmORD - AUS
Nonstop2h 50mMultiple Airlines
Mon 12/155:30 amAUS - ORD
2 stops33h 42mMultiple Airlines
Deal found 12/1$133
This Mytrip deal was found by Cheapflights users on 12/2. 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 12/113:47 pmORD - AUS
Nonstop2h 50mMultiple Airlines
Sun 12/146:00 amAUS - ORD
1 stop8h 21mMultiple Airlines
Deal found 12/2$140
This Travelocity deal was found by Cheapflights users on 12/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:25 amORD - AUS
Nonstop2h 50mMultiple Airlines
Sun 12/146:00 amAUS - ORD
1 stop8h 21mMultiple Airlines
Deal found 12/2$141
This Kiwi.com deal was found by Cheapflights users on 12/2. 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 12/127:25 amORD - AUS
Nonstop2h 50mFrontier
Sun 12/149:12 pmAUS - ORD
2 stops42h 00mFrontier
Deal found 12/2$144
This CheapOair deal was found by Cheapflights users on 12/2. 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.
Fri 12/127:25 amORD - AUS
Nonstop2h 50mFrontier
Mon 12/156:55 amAUS - ORD
1 stop17h 17mFrontier
Deal found 12/2$148
This Super.com deal was found by Cheapflights users on 12/2. 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.
Thu 12/113:47 pmORD - AUS
Nonstop2h 50mFrontier
Sun 12/149:02 pmAUS - ORD
Nonstop2h 57mFrontier
Deal found 12/2$149
This Kiwi.com deal was found by Cheapflights users on 12/2. 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 12/127:25 amORD - AUS
Nonstop2h 50mMultiple Airlines
Mon 12/1510:18 amAUS - ORD
2 stops35h 53mMultiple Airlines
Deal found 12/2$153
This Kiwi.com deal was found by Cheapflights users on 12/2. 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 12/107:43 pmSTL - AUS
1 stop28h 31mFrontier
Thu 1/86:45 amAUS - STL
1 stop27h 17mFrontier
Deal found 12/2$161
This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/107:43 pmSTL - AUS
1 stop28h 31mMultiple Airlines
Wed 12/175:30 amAUS - STL
1 stop29h 26mMultiple Airlines
Deal found 12/1$192
This Southwest deal was found by Cheapflights users on 12/4. 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 12/311:15 pmSTL - AUS
1 stop5h 45mSouthwest
Wed 1/75:35 amAUS - STL
Nonstop2h 00mSouthwest
Deal found 12/4$205

Find flight deals from Illinois to Austin

Keep the following information in mind while searching for Illinois to Austin flight deals. Data was last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$89
(Kiwi.com)

One-way from

$57
(Kiwi.com)

Popular in

November

Cheapest in

July

Average price

$374

Good round-trip deal

$147 or less

Good one-way deal

$95 or less
Provider with most accurate pricing for Chicago (CHI)-Austin Bergstrom flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Austin Bergstrom flights.
Search Deals
From Illinois to Austin Bergstrom
Search Deals
One-way flight from Illinois to Austin Bergstrom
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 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 Illinois to Austin Bergstrom.
Search Deals
Price to beat on a one-way flight from Illinois to Austin Bergstrom.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Austin 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 4, 2025.
Use the filters below to find and compare flights from Illinois to Austin that are best for you.

Fly from

Illinois

Fly to

Austin

Route

Depart

Return

Price

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Tue 2/10

10:25 am-12:45 pm

Nonstop2h 20m

Austin Bergstrom

Sat 2/14

9:55 am-12:00 pm

Nonstop2h 05m

$169

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Fri 1/16

4:50 pm-10:59 pm

1 stop6h 09m

Austin Bergstrom

Sun 1/18

6:30 am-9:20 am

Nonstop2h 50m

$170

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 2/28

2:26 pm-11:59 pm

1 stop9h 33m

Austin Bergstrom

Wed 3/4

9:00 am-5:03 pm

1 stop8h 03m

$172

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 2/14

2:20 pm-6:00 pm

1 stop3h 40m

Austin Bergstrom

Tue 2/17

5:10 am-7:10 am

Nonstop2h 00m

$181

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 1/8

10:25 am-12:45 pm

Nonstop2h 20m

Austin Bergstrom

Mon 1/12

5:35 am-7:35 am

Nonstop2h 00m

$184

MolineAustin

MLI - AUS

MLIAUS

Moline Quad-City

Tue 2/17

12:41 pm-7:33 pm

1 stop6h 52m

Austin Bergstrom

Sat 2/21

5:00 am-10:35 am

1 stop5h 35m

$191

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Fri 1/9

7:55 pm-10:50 pm

Nonstop2h 55m

Austin Bergstrom

Mon 1/12

6:30 am-9:00 am

Nonstop2h 30m

$195

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Thu 2/5

8:05 am-11:00 am

Nonstop2h 55m

Austin Bergstrom

Mon 2/9

6:25 am-8:55 am

Nonstop2h 30m

$195

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Fri 2/6

8:30 pm-11:20 pm

Nonstop2h 50m

Austin Bergstrom

Mon 2/9

12:00 pm-2:30 pm

Nonstop2h 30m

$195

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Thu 1/29

6:00 am-1:57 pm

1 stop7h 57m

Austin Bergstrom

Mon 2/2

5:10 pm-10:22 pm

1 stop5h 12m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

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

Have a flexible travel schedule? Discover the best time to fly to Austin from Illinois 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 Illinois to Austin

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Austin (average of $74). Flying from Illinois to Austin in February is currently the most expensive (average of $180). 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 IL to AUS?

Find hourly flight availability from Illinois to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 16% on flights from Illinois to Austin by exploring options for tickets in the evening.

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

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

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

Weekly flight availability from Illinois to Austin

Explore weekly flight availability from Illinois to Austin. 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 4, 2025.

The most flights from USIL to AUS are scheduled on a Wednesday (35 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

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

Related info for your journey

Find useful and relevant information for your journey from Illinois to Austin. 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 into for flights to Austin from Illinois?

    Austin Bergstrom (AUS) is the airport you will fly into if you book a flight from Illinois to Austin. It is only a 7.5 mi journey from Austin Bergstrom (AUS) to Austin’s city center.

  • How long is the flight from Illinois to Austin?

    There are many flights that can get you from Illinois to Austin in 2h 20m. Fly via Southwest, United Airlines, or American Airlines to get the fastest option. Illinois and Austin are separated by a distance of 722 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $42 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and American Airlines, with prices starting from $80 and $82, respectively.

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

    While some choose either Chicago Midway - Austin Bergstrom or Lambert-St Louis - Austin Bergstrom, Chicago O'Hare Intl - Austin Bergstrom is the most popular route from Illinois to Austin.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Austin on time: Qatar Airways (81%), Southwest (81%), ANA (77%).

  • What are the cheapest flights from Illinois to Austin?

    Looking for the cheapest flight from Illinois to Austin? While on average our users pay $291, our data indicates the cheapest price to be $44. The most popular route (Chicago O'Hare Intl - Austin Bergstrom), is priced around $85.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Austin 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 Illinois to Austin?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Austin (average of $74). Flying from Illinois to Austin in February is currently the most expensive (average of $180). 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

Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Cedar Park
Round Rock
San Marcos
Georgetown
Fredericksburg
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay

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Top 5 airlines flying from Illinois to Austin

Discover the top 5 airlines that operate flights from Illinois to Austin. 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 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$67Average$240FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$86Average$262FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$164Average$355FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$168Average$374FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$169Average$324FlexibilityNo cancel feeOn-time63%

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