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$78+ Cheap flights from Austin (AUS) to Illinois

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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
abr. 20 — abr. 271
dom. 4/20
dom. 4/27
1 adult, Economy
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Cheap flight deals from Austin to Illinois

Keep the following information in mind while searching for Austin to Illinois flight deals. Data was last updated abril 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$140
(Cheapflightsfares)

One-way from

$86
(Mytrip)

Popular in

December

Cheapest in

April

Average price

$252

Good round-trip deal

$228 or less

Good one-way deal

$147 or less
Provider with most accurate pricing for Austin Bergstrom-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Austin Bergstrom-Chicago (CHI) flights.
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From Austin Bergstrom to Illinois
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One-way flight from Austin Bergstrom to Illinois
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Austin Bergstrom to Illinois.
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Price to beat on a one-way flight from Austin Bergstrom to Illinois.
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Find flight deals from Austin to Illinois

Cheapest flights from Austin to Illinois
Explore the most affordable flight options available from Austin to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
mar. 5/134:31 pmAUS - ORD
1 stop19h 05mSpirit Airlines
mar. 5/2012:41 pmORD - AUS
1 stop10h 22mSpirit Airlines
Deal found 4/14$140
This Kiwi.com deal was found by Cheapflights users on 4/14. 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. 6/210:49 amAUS - ORD
Nonstop2h 50mMultiple Airlines
mié. 6/2511:50 amORD - AUS
1 stop7h 29mMultiple Airlines
Deal found 4/14$142
This Southwest deal was found by Cheapflights users on 4/14. 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.
mié. 5/287:45 pmAUS - MDW
Nonstop2h 30mSouthwest
sáb. 5/318:25 pmMDW - AUS
Nonstop2h 40mSouthwest
Deal found 4/14$159
This United Airlines deal was found by Cheapflights users on 4/14. 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.
mié. 6/41:00 pmAUS - ORD
Nonstop2h 54mUnited Airlines
mar. 6/249:04 amORD - AUS
Nonstop2h 54mUnited Airlines
Deal found 4/14$159
This Frontier deal was found by Cheapflights users on 4/15. 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.
lun. 5/191:22 pmAUS - ORD
Nonstop2h 47mFrontier
lun. 5/267:15 amORD - AUS
Nonstop2h 52mFrontier
Deal found 4/15$161
This American Airlines deal was found by Cheapflights users on 4/15. 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.
mar. 6/178:00 amAUS - ORD
Nonstop2h 55mAmerican Airlines
mar. 6/249:10 pmORD - AUS
Nonstop2h 44mAmerican Airlines
Deal found 4/15$169
This CheapOair deal was found by Cheapflights users on 4/14. 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.
mar. 4/156:29 pmAUS - MDW
1 stop5h 52mFrontier
mar. 4/226:45 amMDW - AUS
1 stop16h 33mFrontier
Deal found 4/14$180
This CheapOair deal was found by Cheapflights users on 4/14. 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.
lun. 5/510:32 amAUS - STL
1 stop13h 34mFrontier
mié. 5/78:15 pmSTL - AUS
1 stop15h 50mFrontier
Deal found 4/14$190
This Booking.com deal was found by Cheapflights users on 4/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/77:14 amAUS - STL
1 stop26h 01mMultiple Airlines
dom. 5/115:45 pmSTL - AUS
1 stop15h 57mMultiple Airlines
Deal found 4/14$204
This United Airlines deal was found by Cheapflights users on 4/15. 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.
mar. 5/139:55 amAUS - STL
1 stop5h 54mUnited Airlines
mar. 5/204:50 pmSTL - AUS
1 stop5h 55mUnited Airlines
Deal found 4/15$209
This Southwest deal was found by Cheapflights users on 4/15. 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.
jue. 5/85:00 amAUS - STL
Nonstop2h 05mSouthwest
dom. 5/1112:30 pmSTL - AUS
Nonstop2h 05mSouthwest
Deal found 4/15$211
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/106:23 pmAUS - STL
1 stop5h 15mDelta
mar. 5/135:40 pmSTL - AUS
1 stop5h 21mDelta
Deal found 4/14$214

Cheapflights Fare Finder

Customize your flight search to find flights from Austin to Illinois 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 abril 15, 2025.
Use the filters below to find and compare flights from Austin to Illinois that are best for you.

Fly from

Austin

Fly to

Illinois

Route

Depart

Return

Price

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

mar. 5/13

4:31 pm-11:36 am

1 stop19h 05m

Chicago O'Hare Intl

mar. 5/20

12:41 pm-11:03 pm

1 stop10h 22m

$140

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

lun. 6/2

10:49 am-1:39 pm

Nonstop2h 50m

Chicago O'Hare Intl

mié. 6/25

11:50 am-7:19 pm

1 stop7h 29m

$142

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

mié. 5/28

7:45 pm-10:15 pm

Nonstop2h 30m

Chicago Midway

sáb. 5/31

8:25 pm-11:05 pm

Nonstop2h 40m

$159

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

mié. 6/4

1:00 pm-3:54 pm

Nonstop2h 54m

Chicago O'Hare Intl

mar. 6/24

9:04 am-11:58 am

Nonstop2h 54m

$159

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

lun. 5/19

1:22 pm-4:09 pm

Nonstop2h 47m

Chicago O'Hare Intl

lun. 5/26

7:15 am-10:07 am

Nonstop2h 52m

$161

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

mar. 6/17

8:00 am-10:55 am

Nonstop2h 55m

Chicago O'Hare Intl

mar. 6/24

9:10 pm-11:54 pm

Nonstop2h 44m

$169

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

lun. 5/19

12:32 pm-11:47 pm

1 stop11h 15m

Chicago Midway

sáb. 5/24

2:44 pm-11:40 pm

1 stop8h 56m

$188

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

lun. 5/5

10:32 am-12:06 am

1 stop13h 34m

Lambert-St Louis

mié. 5/7

8:15 pm-12:05 pm

1 stop15h 50m

$190

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

mié. 5/7

7:14 am-9:15 am

1 stop26h 01m

Lambert-St Louis

dom. 5/11

5:45 pm-9:42 am

1 stop15h 57m

$204

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

mar. 5/13

9:55 am-3:49 pm

1 stop5h 54m

Lambert-St Louis

mar. 5/20

4:50 pm-10:45 pm

1 stop5h 55m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 58 results
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Best time to book a flight from Austin to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Austin to Illinois (average of $245). Flying from Austin to Illinois in March is currently the most expensive (average of $321). 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 AUS to IL?

Find hourly flight availability from Austin to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 15, 2025.

When flying from Austin to Illinois, 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 Austin to Illinois

Explore weekly flight availability from Austin to Illinois. 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 abril 15, 2025.

The most flights from AUS to USIL are scheduled on a Friday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (24 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated abril 15, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Austin to Illinois have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,876 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Allegiant Air
7.3
Good
734 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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

    Austin Bergstrom (AUS), located 7.5 mi from the city center, is the airport you fly out of when you book flights from Austin to Illinois.

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

    One-way options have recently been found by users for as low as $86 on Spirit Airlines. Other airlines that offer cheap prices include Southwest from $89 and American Airlines from $89 one-way.

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

    Most travelers choose Austin Bergstrom - Chicago O'Hare Intl, Austin Bergstrom - Chicago Midway or Austin Bergstrom - Lambert-St Louis when deciding on the best route from Austin to Illinois.

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

    Consider SkyWest Airlines (100%), Air Canada (92%) or Emirates (90%) when booking your flight. These represent the most reliable airlines when flying from Austin to Illinois.

  • What are the cheapest flights from Austin to Illinois?

    Looking for the cheapest flight from Austin to Illinois? While on average our users pay $992, our data indicates the cheapest price to be $88. The most popular route (Austin Bergstrom - Chicago O'Hare Intl), is priced around $134.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Austin to Illinois (average of $245). Flying from Austin to Illinois in March is currently the most expensive (average of $321). 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

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Alternative routes for Austin to Illinois

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

Discover the top 6 airlines that operate flights from Austin to Illinois. 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 abril 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$40Average$179FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$169Average$362FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$184Average$403FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$186Average$290FlexibilityNo cancel feeOn-time65%
DeltaCheapest$195Average$349FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$213Average$390FlexibilityNo cancel feeOn-time69%

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