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$71+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — AUS
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
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 March 13, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/93:50 pm
ORD
-
AUS
Nonstop3h 21m
Frontier
Thu 4/168:19 pm
AUS
-
ORD
Nonstop2h 52m
Frontier
Deal found 3/8$127
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/64:36 pm
ORD
-
AUS
1 stop7h 48m
Multiple Airlines
Thu 4/168:19 pm
AUS
-
ORD
Nonstop2h 52m
Multiple Airlines
Deal found 3/9$128
This Frontier deal was found by Cheapflights users on 3/8. 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.
Thu 5/79:03 am
ORD
-
AUS
Nonstop3h 06m
Frontier
Mon 5/118:39 pm
AUS
-
ORD
1 stop10h 08m
Frontier
Deal found 3/8$134
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/106:00 pm
ORD
-
AUS
Nonstop3h 21m
Frontier
Thu 4/168:19 pm
AUS
-
ORD
Nonstop2h 52m
Frontier
Deal found 3/9$136
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 4/134:36 pm
ORD
-
AUS
1 stop7h 48m
Multiple Airlines
Thu 4/168:19 pm
AUS
-
ORD
Nonstop2h 52m
Multiple Airlines
Deal found 3/10$138
This Super.com deal was found by Cheapflights users on 3/8. 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 4/308:58 pm
ORD
-
AUS
1 stop22h 46m
Frontier
Thu 5/71:04 pm
AUS
-
ORD
Nonstop2h 52m
Frontier
Deal found 3/8$139
This Super.com deal was found by Cheapflights users on 3/9. 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.
Mon 5/49:00 am
ORD
-
AUS
Nonstop3h 21m
Frontier
Thu 5/71:04 pm
AUS
-
ORD
Nonstop2h 52m
Frontier
Deal found 3/9$141
This Frontier deal was found by Cheapflights users on 3/11. 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.
Mon 4/278:50 am
ORD
-
AUS
Nonstop3h 21m
Frontier
Mon 5/188:48 pm
AUS
-
ORD
Nonstop2h 54m
Frontier
Deal found 3/11$143
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 4/84:36 pm
ORD
-
AUS
1 stop7h 48m
Multiple Airlines
Fri 4/1010:06 pm
AUS
-
ORD
Nonstop2h 52m
Multiple Airlines
Deal found 3/10$144
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 4/212:00 pm
ORD
-
AUS
1 stop12h 24m
Multiple Airlines
Thu 4/168:19 pm
AUS
-
ORD
Nonstop2h 52m
Multiple Airlines
Deal found 3/7$145
This Super.com deal was found by Cheapflights users on 3/9. 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.
Fri 4/106:00 pm
ORD
-
AUS
Nonstop3h 21m
Frontier
Mon 4/1310:11 pm
AUS
-
ORD
Nonstop2h 52m
Frontier
Deal found 3/9$146
This Expedia deal was found by Cheapflights users on 3/9. 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.
Wed 4/16:00 am
MDW
-
AUS
1 stop9h 12m
Frontier
Tue 4/74:14 pm
AUS
-
MDW
1 stop6h 05m
Frontier
Deal found 3/9$160

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$127
(Kiwi.com)

One-way from

$71
(Super.com)

Popular in

December

Cheapest in

January

Average price

$309

Good round-trip deal

$233 or less

Good one-way deal

$132 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
High demand for flights, 0% potential price rise
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 March 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 March 13, 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

Mon 5/11

7:20 am-1:10 pm

1 stop5h 50m

Austin Bergstrom

Tue 5/12

3:50 pm-6:00 pm

Nonstop2h 10m

$209
Quickest round-trip

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 5/16

8:50 am-11:00 am

Nonstop2h 10m

Austin Bergstrom

Mon 5/18

7:30 am-9:35 am

Nonstop2h 05m

$209

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Sat 4/25

8:50 am-11:00 am

Nonstop2h 10m

Austin Bergstrom

Sat 5/2

3:55 pm-6:05 pm

Nonstop2h 10m

$209

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Thu 4/30

5:50 am-4:45 pm

1 stop10h 55m

Austin Bergstrom

Mon 5/4

1:10 pm-4:02 pm

Nonstop2h 52m

$215

ChicagoAustin

ORD - AUS

ORDAUS

Chicago O'Hare Intl

Fri 5/8

7:05 am-10:10 am

Nonstop3h 05m

Austin Bergstrom

Sun 5/10

7:00 am-9:50 am

Nonstop2h 50m

$217

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Thu 5/14

5:00 am-11:00 am

1 stop6h 00m

Austin Bergstrom

Sat 5/16

3:05 pm-9:05 pm

1 stop6h 00m

$218

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Wed 5/13

2:10 pm-6:25 pm

1 stop4h 15m

Austin Bergstrom

Sun 5/17

10:35 pm-1:00 am

Nonstop2h 25m

$223

ChicagoAustin

MDW - AUS

MDWAUS

Chicago Midway

Fri 5/8

11:40 am-5:05 pm

1 stop5h 25m

Austin Bergstrom

Sun 5/10

10:35 pm-1:00 am

Nonstop2h 25m

$223

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Wed 4/15

1:25 pm-7:20 pm

1 stop5h 55m

Austin Bergstrom

Sat 4/18

12:50 pm-7:45 pm

2 stops6h 55m

$224

St. LouisAustin

STL - AUS

STLAUS

Lambert-St Louis

Fri 4/17

5:05 am-11:00 am

1 stop5h 55m

Austin Bergstrom

Mon 4/20

7:30 am-9:35 am

Nonstop2h 05m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

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 $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 March 13, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 10% on flights from Illinois to Austin by exploring options for tickets in the afternoon.

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 March 12, 2026.

Travelers seeking maximum savings on their Illinois to Austin flight should consider departing on Monday 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 March 13, 2026.

The most flights from USIL to AUS are scheduled on a Thursday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 3h 05m. Fly via Southwest, Frontier, or United Airlines to get the fastest option. Illinois and Austin are separated by a distance of 978 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?

    $39 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 $49 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: Aer Lingus (89%), Air Canada (85%), United Airlines (84%).

  • What are the cheapest flights from Illinois to Austin?

    Looking for the cheapest flight from Illinois to Austin? While on average our users pay $555, our data indicates the cheapest price to be $79. The most popular route (Chicago O'Hare Intl - Austin Bergstrom), is priced around $137.

  • 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
San Marcos
Fredericksburg
Round Rock
Georgetown
Bastrop
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

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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$57Average$237FlexibilityNo cancel feeOn-time65%
FrontierCheapest$59Average$239FlexibilityNo cancel feeOn-time62%
DeltaCheapest$118Average$317FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$155Average$335FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$159Average$292FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$167Average$365FlexibilityNo cancel feeOn-time71%

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