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$43+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — AUS
feb. 19 — feb. 261
jue. 2/19
jue. 2/26
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 enero 20, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
vie. 1/308:25 am
ORD
-
AUS
Nonstop3h 04m
Frontier
lun. 2/211:59 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Deal found 1/20$92
This Super.com deal was found by Cheapflights users on 1/20. 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.
vie. 2/68:25 am
ORD
-
AUS
Nonstop3h 04m
Frontier
lun. 2/911:59 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Deal found 1/20$93
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
jue. 3/126:04 pm
ORD
-
AUS
Nonstop3h 04m
Frontier
dom. 3/2210:03 pm
AUS
-
ORD
Nonstop2h 46m
Frontier
Deal found 1/19$104
This Expedia deal was found by Cheapflights users on 1/18. 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.
jue. 3/126:04 pm
ORD
-
AUS
Nonstop3h 04m
Frontier
dom. 3/1510:03 pm
AUS
-
ORD
Nonstop2h 46m
Frontier
Deal found 1/18$105
This CheapOair deal was found by Cheapflights users on 1/18. 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.
dom. 4/54:41 pm
ORD
-
AUS
Nonstop3h 06m
Frontier
jue. 4/98:06 pm
AUS
-
ORD
Nonstop2h 52m
Frontier
Deal found 1/18$106
This Frontier deal was found by Cheapflights users on 1/18. 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.
vie. 2/202:30 pm
ORD
-
AUS
Nonstop3h 04m
Frontier
lun. 2/2311:44 am
AUS
-
ORD
Nonstop2h 46m
Frontier
Deal found 1/18$110
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
lun. 2/237:45 am
ORD
-
AUS
Nonstop3h 04m
Multiple Airlines
sáb. 2/2811:34 am
AUS
-
ORD
1 stop8h 16m
Multiple Airlines
Deal found 1/18$113
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
jue. 3/126:04 pm
ORD
-
AUS
Nonstop3h 04m
Frontier
mar. 3/171:40 pm
AUS
-
ORD
1 stop16h 28m
Frontier
Deal found 1/19$115
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
vie. 2/202:30 pm
ORD
-
AUS
Nonstop3h 04m
Multiple Airlines
vie. 2/2711:34 am
AUS
-
ORD
1 stop7h 37m
Multiple Airlines
Deal found 1/18$116
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
vie. 2/202:30 pm
ORD
-
AUS
Nonstop3h 04m
Multiple Airlines
mar. 2/247:15 am
AUS
-
ORD
1 stop11h 56m
Multiple Airlines
Deal found 1/19$118
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
vie. 2/202:30 pm
ORD
-
AUS
Nonstop3h 04m
Multiple Airlines
sáb. 2/2811:34 am
AUS
-
ORD
1 stop8h 16m
Multiple Airlines
Deal found 1/18$119
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
lun. 2/236:00 am
MDW
-
AUS
1 stop8h 47m
Frontier
vie. 2/2710:17 am
AUS
-
MDW
1 stop8h 21m
Frontier
Deal found 1/20$147

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 enero 20, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$92
(Kiwi.com)

One-way from

$43
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$218

Good round-trip deal

$135 or less

Good one-way deal

$91 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. 0% potential increase in price ($1 potential increase over avg. RT price).
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 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 enero 20, 2026.
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

lun. 2/16

3:49 pm-8:53 pm

2 stops29h 04m

Austin Bergstrom

lun. 2/23

7:41 pm-10:27 pm

1 stop26h 46m

$176

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

vie. 4/10

2:30 pm-5:10 pm

Nonstop2h 40m

Austin Bergstrom

mar. 4/14

2:00 pm-4:35 pm

Nonstop2h 35m

$191

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

jue. 3/12

1:25 pm-4:28 pm

Nonstop3h 03m

Austin Bergstrom

mar. 3/17

7:00 am-9:47 am

Nonstop2h 47m

$191

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

lun. 2/2

1:40 pm-12:16 am

1 stop10h 36m

Austin Bergstrom

vie. 2/6

6:55 am-6:44 pm

1 stop11h 49m

$195

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

mié. 2/18

6:00 am-11:23 am

1 stop5h 23m

Austin Bergstrom

sáb. 2/21

5:30 am-10:21 am

1 stop4h 51m

$199

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

mié. 2/18

6:00 am-11:23 am

1 stop5h 23m

Austin Bergstrom

mié. 2/25

3:30 pm-10:31 pm

1 stop7h 01m

$199

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

mié. 2/18

5:25 am-11:23 am

1 stop5h 58m

Austin Bergstrom

sáb. 2/21

5:20 am-1:20 pm

1 stop8h 00m

$199

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

mar. 3/10

5:50 pm-11:44 pm

1 stop5h 54m

Austin Bergstrom

mar. 3/24

1:10 pm-3:57 pm

Nonstop2h 47m

$201

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

mar. 3/10

9:04 am-12:05 pm

Nonstop3h 01m

Austin Bergstrom

mar. 3/10

4:18 pm-11:08 pm

1 stop6h 50m

$201

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

jue. 3/12

9:40 pm-12:30 am

Nonstop2h 50m

Austin Bergstrom

mar. 3/17

7:20 am-9:45 am

Nonstop2h 25m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

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, January is the cheapest month in which you can book a flight from Illinois to Austin (average of $59). Flying from Illinois to Austin in September is currently the most expensive (average of $154). 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 enero 20, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 6% on flights from Illinois to Austin by exploring options for tickets at noon.

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 January 17, 2026.

Travelers seeking maximum savings on their Illinois to Austin flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon 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 enero 20, 2026.

The most flights from USIL to AUS are scheduled on a Monday (24 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (15 on average).

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 40m. Fly via Southwest, United Airlines, or Frontier to get the fastest option. Illinois and Austin are separated by a distance of 972 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?

    $33 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: Envoy Air (83%), United Airlines (78%), ANA (76%).

  • What are the cheapest flights from Illinois to Austin?

    Looking for the cheapest flight from Illinois to Austin? While on average our users pay $471, our data indicates the cheapest price to be $29. The most popular route (Chicago O'Hare Intl - Austin Bergstrom), is priced around $118.

  • 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 $59). Flying from Illinois to Austin in September is currently the most expensive (average of $154). 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
Fredericksburg
Round Rock
San Marcos
Georgetown
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Austin

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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 enero 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$57Average$251FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$86Average$262FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$151Average$334FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$168Average$364FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$169Average$314FlexibilityNo cancel feeOn-time63%

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