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$79+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — AUS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Illinois to Austin

Keep the following information in mind while searching for Illinois to Austin flight deals. Data was last updated July 31, 2025.

Round-trip from

$156
(Frontier)

One-way from

$79
(Southwest)

Popular in

December

Cheapest in

July

Average price

$256

Good round-trip deal

$190 or less

Good one-way deal

$118 or less
From Illinois to Austin Bergstrom
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One-way flight from Illinois to Austin Bergstrom
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Highest demand for flights based on searches. 13% potential increase in price ($48 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 Illinois to Austin Bergstrom.
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Price to beat on a one-way flight from Illinois to Austin Bergstrom.
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Find 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 July 31, 2025.

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:15 amORD - AUS
Nonstop2h 50mFrontier
Mon 11/310:50 amAUS - ORD
Nonstop2h 49mFrontier
Deal found 7/29$156
This Southwest deal was found by Cheapflights users on 7/31. 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 8/211:50 pmSTL - AUS
Nonstop2h 00mSouthwest
Mon 8/2512:45 pmAUS - STL
Nonstop2h 10mSouthwest
Deal found 7/31$157
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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.
Sat 8/1611:36 amORD - AUS
1 stop13h 23mSpirit Airlines
Wed 8/207:15 amAUS - ORD
1 stop11h 52mSpirit Airlines
Deal found 7/31$160
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/611:57 amORD - AUS
1 stop11h 05mMultiple Airlines
Mon 9/811:27 amAUS - ORD
Nonstop2h 53mMultiple Airlines
Deal found 7/30$167
This Southwest deal was found by Cheapflights users on 7/31. 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 8/2811:45 amMDW - AUS
Nonstop2h 35mSouthwest
Mon 9/16:05 amAUS - MDW
Nonstop2h 35mSouthwest
Deal found 7/31$169
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/281:15 pmORD - AUS
Nonstop2h 50mUnited Airlines
Thu 9/410:00 amAUS - ORD
Nonstop2h 55mUnited Airlines
Deal found 7/30$169
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/275:15 amSTL - AUS
1 stop6h 16mAmerican Airlines
Tue 9/22:52 pmAUS - STL
1 stop8h 13mAmerican Airlines
Deal found 7/29$177
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 8/208:26 amORD - AUS
Nonstop2h 42mAmerican Airlines
Thu 8/216:00 amAUS - ORD
Nonstop2h 52mAmerican Airlines
Deal found 7/30$193
This Southwest deal was found by Cheapflights users on 7/30. 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 8/214:20 pmORD - AUS
Nonstop2h 50mSouthwest
Mon 8/2510:20 amAUS - ORD
Nonstop2h 45mSouthwest
Deal found 7/30$204
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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.
Fri 9/54:48 pmMDW - AUS
1 stop6h 44mFrontier
Sun 9/75:24 pmAUS - MDW
1 stop5h 56mFrontier
Deal found 7/31$206
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/276:15 amSTL - AUS
1 stop4h 43mUnited Airlines
Wed 9/35:30 amAUS - STL
2 stops6h 55mUnited Airlines
Deal found 7/30$214
This FlightHub deal was found by Cheapflights users on 7/30. 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.
Tue 10/287:52 pmSTL - AUS
1 stop27h 42mFrontier
Sun 11/21:57 pmAUS - STL
1 stop30h 15mFrontier
Deal found 7/30$215

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 July 31, 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

Thu 8/21

1:50 pm-3:50 pm

Nonstop2h 00m

Austin Bergstrom

Mon 8/25

12:45 pm-2:55 pm

Nonstop2h 10m

$157

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Thu 10/9

7:15 am-10:05 am

Nonstop2h 50m

Austin Bergstrom

Mon 10/13

10:59 am-1:48 pm

Nonstop2h 49m

$158

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Sat 8/16

11:36 am-12:59 am

1 stop13h 23m

Austin Bergstrom

Wed 8/20

7:15 am-7:07 pm

1 stop11h 52m

$160

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Sat 9/6

11:57 am-11:02 pm

1 stop11h 05m

Austin Bergstrom

Mon 9/8

11:27 am-2:20 pm

Nonstop2h 53m

$167

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Thu 8/28

1:15 pm-4:05 pm

Nonstop2h 50m

Austin Bergstrom

Thu 9/4

10:00 am-12:55 pm

Nonstop2h 55m

$169

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Thu 8/28

11:45 am-2:20 pm

Nonstop2h 35m

Austin Bergstrom

Mon 9/1

6:05 am-8:40 am

Nonstop2h 35m

$169

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 8/27

6:26 am-12:12 pm

1 stop5h 46m

Austin Bergstrom

Wed 9/3

6:00 am-11:35 am

1 stop5h 35m

$177

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Wed 8/20

8:26 am-11:08 am

Nonstop2h 42m

Austin Bergstrom

Thu 8/21

6:00 am-8:52 am

Nonstop2h 52m

$193

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Thu 8/21

4:20 pm-7:10 pm

Nonstop2h 50m

Austin Bergstrom

Mon 8/25

10:20 am-1:05 pm

Nonstop2h 45m

$204

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Fri 9/5

4:48 pm-11:32 pm

1 stop6h 44m

Austin Bergstrom

Sun 9/7

5:24 pm-11:20 pm

1 stop5h 56m

$206

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 52 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, January is the cheapest month in which you can book a flight from Illinois to Austin (average of $286). Flying from Illinois to Austin in March is currently the most expensive (average of $362). 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 July 31, 2025.

When flying from Illinois to Austin, 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 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 July 31, 2025.

The most flights from USIL to AUS are scheduled on a Thursday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Reviews of airlines servicing Austin

Get insights into the airlines that provide service to Austin. 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 Austin. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Illinois to Austin to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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.
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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 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.

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

    $79 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and Spirit Airlines, with prices starting from $89 and $90, 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: United Airlines (81%), Envoy Air (79%), SkyWest Airlines (75%).

  • What are the cheapest flights from Illinois to Austin?

    Looking for the cheapest flight from Illinois to Austin? While on average our users pay $480, our data indicates the cheapest price to be $95. The most popular route (Chicago O'Hare Intl - Austin Bergstrom), is priced around $142.

  • 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, January is the cheapest month in which you can book a flight from Illinois to Austin (average of $286). Flying from Illinois to Austin in March is currently the most expensive (average of $362). 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
San Marcos
Georgetown
Fredericksburg
Pflugerville
Dripping Springs
Cedar Park
Canyon Lake
Round Rock
Seguin
Horseshoe Bay

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Alternative routes for Illinois to Austin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Illinois to Austin

Discover the top 6 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$74Average$211FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$90Average$262FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$170Average$375FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$349FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$210Average$379FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$288FlexibilityNo cancel feeOn-timeN/A

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