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$83+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — AUS
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
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 July 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/22. 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 10/610:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Thu 10/810:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Deal found 7/22$173
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/1910:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Thu 10/2210:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Deal found 7/26$176
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 9/1710:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Mon 9/2110:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Deal found 7/23$177
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 9/2210:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Thu 9/2410:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Deal found 7/22$179
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/910:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Mon 10/1210:50 am
AUS
-
STL
1 stop22h 50m
Frontier
Deal found 7/26$182
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/206:17 pm
STL
-
AUS
1 stop22h 22m
Frontier
Thu 8/275:37 pm
AUS
-
STL
1 stop23h 45m
Frontier
Deal found 7/23$184
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/710:35 am
STL
-
AUS
1 stop23h 13m
Frontier
Sat 10/1010:43 am
AUS
-
STL
1 stop22h 57m
Frontier
Deal found 7/23$189
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 9/112:29 pm
STL
-
AUS
1 stop27h 19m
Frontier
Mon 9/141:25 pm
AUS
-
STL
1 stop5h 52m
Frontier
Deal found 7/24$206
This Southwest deal was found by Cheapflights users on 7/22. 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 8/138:25 am
STL
-
AUS
Nonstop2h 00m
Southwest
Mon 8/177:25 am
AUS
-
STL
Nonstop2h 05m
Southwest
Deal found 7/22$209
This Southwest deal was found by Cheapflights users on 7/23. 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.
Fri 10/309:45 pm
STL
-
AUS
Nonstop2h 05m
Southwest
Mon 11/27:35 am
AUS
-
STL
Nonstop2h 00m
Southwest
Deal found 7/23$214
This Southwest deal was found by Cheapflights users on 7/22. 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 8/198:25 am
STL
-
AUS
Nonstop2h 00m
Southwest
Wed 8/2612:55 pm
AUS
-
STL
1 stop3h 30m
Southwest
Deal found 7/22$215
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/137:05 am
ORD
-
AUS
1 stop9h 34m
Frontier
Sat 8/156:30 am
AUS
-
ORD
1 stop14h 22m
Frontier
Deal found 7/22$250

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 July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$173
(Kiwi.com)

One-way from

$83
(Trip.com)

Popular in

July

Cheapest in

January

Average price

$360

Good round-trip deal

$286 or less

Good one-way deal

$168 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. 8% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 27, 2026.
Use the filters below to find and compare flights from Illinois to Austin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 9/17

8:45 pm-10:50 pm

Nonstop2h 05m

Austin Bergstrom

Mon 9/21

3:15 pm-5:20 pm

Nonstop2h 05m

$209
Quickest round-trip

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 8/29

8:25 am-10:25 am

Nonstop2h 00m

Austin Bergstrom

Thu 9/10

3:15 pm-5:20 pm

Nonstop2h 05m

$217

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 9/12

3:54 pm-11:13 pm

1 stop7h 19m

Austin Bergstrom

Wed 9/16

5:15 am-10:55 am

1 stop5h 40m

$227

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 10/7

6:00 am-11:13 am

1 stop5h 13m

Austin Bergstrom

Sat 10/10

6:25 am-1:20 pm

1 stop6h 55m

$227

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Thu 9/17

7:05 am-12:30 pm

1 stop5h 25m

Austin Bergstrom

Mon 9/21

5:07 pm-11:42 pm

1 stop6h 35m

$227

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Mon 8/31

3:13 pm-7:57 pm

1 stop4h 44m

Austin Bergstrom

Mon 9/7

5:30 am-10:10 am

1 stop4h 40m

$229

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Sat 9/5

1:30 pm-4:24 pm

Nonstop2h 54m

Austin Bergstrom

Tue 9/8

3:33 pm-6:30 pm

Nonstop2h 57m

$261

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Wed 10/7

10:00 am-12:35 pm

Nonstop2h 35m

Austin Bergstrom

Sat 10/10

4:55 pm-7:30 pm

Nonstop2h 35m

$261

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 10/9

12:50 pm-2:55 pm

Nonstop2h 05m

Austin Bergstrom

Mon 10/12

7:50 pm-12:35 am

1 stop4h 45m

$268

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Sat 10/3

5:30 am-11:08 am

1 stop5h 38m

Austin Bergstrom

Mon 10/5

3:37 pm-6:35 pm

Nonstop2h 58m

$271

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $211). Flying from Illinois to Austin in July is currently the most expensive (average of $389). 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 27, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 11% on flights from Illinois to Austin by exploring options for tickets in the afternoon.

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 27, 2026.

The most flights from USIL to AUS are scheduled on a Monday (37 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (34 on average).

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

Airfare is typical for this route at the moment.
Illinois to Austin flights typically cost between $191 and $367 in August.
The cheapest round-trip price found within the last 5 days was $250 on Frontier (Aug 13-Aug 15).

How far ahead should I book a flight from Illinois to Austin?

The best time to book flights from Illinois to Austin is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 July 25, 2026.

Travelers seeking maximum savings on their Illinois to Austin flight should consider departing on Tuesday at noon 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.

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 05m. Fly via Southwest, Delta, or United 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?

    $34 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and American Airlines, with prices starting from $78 and $86, 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: Air Canada (80%), Japan Airlines (76%), United Airlines (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 $478, our data indicates the cheapest price to be $118. The most popular route (Chicago O'Hare Intl - Austin Bergstrom), is priced around $261.

  • 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 $211). Flying from Illinois to Austin in July is currently the most expensive (average of $389). 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
Round Rock
Cedar Park
San Marcos
Bastrop
Fredericksburg
Pflugerville
Dripping Springs
Georgetown
Seguin
Canyon Lake

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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 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$218FlexibilityNo cancel feeOn-time62%
DeltaCheapest$118Average$310FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$151Average$355FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$169Average$376FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$179Average$342FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$190Average$268FlexibilityNo cancel feeOn-time62%

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