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$87+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$173
(Kiwi.com)

One-way from

$87
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$304

Good round-trip deal

$231 or less

Good one-way deal

$149 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
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Highest demand for flights based on searches. 10% potential increase in price ($40 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 May 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 May 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Mon 5/128:11 pmAUS - ORD
1 stop9h 14mSpirit Airlines
Wed 6/116:59 pmORD - AUS
1 stop18h 25mSpirit Airlines
Deal found 4/30$173
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Fri 5/3010:57 amAUS - ORD
Nonstop2h 49mMultiple Airlines
Wed 6/411:50 amORD - AUS
1 stop7h 26mMultiple Airlines
Deal found 4/30$178
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/281:00 pmAUS - ORD
Nonstop2h 54mUnited Airlines
Wed 6/49:00 amORD - AUS
Nonstop2h 54mUnited Airlines
Deal found 4/30$179
This Frontier deal was found by Cheapflights users on 4/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/161:22 pmAUS - ORD
Nonstop2h 47mFrontier
Thu 6/124:12 pmORD - AUS
Nonstop2h 49mFrontier
Deal found 4/30$188
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/284:45 pmAUS - MDW
1 stop5h 10mSouthwest
Tue 6/38:45 pmMDW - AUS
Nonstop2h 40mSouthwest
Deal found 4/29$189
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 6/246:36 pmAUS - ORD
Nonstop2h 48mAmerican Airlines
Sat 7/55:00 amORD - AUS
1 stop5h 14mAmerican Airlines
Deal found 4/30$189
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:00 amAUS - STL
1 stop27h 59mFrontier
Sun 5/119:55 pmSTL - AUS
1 stop17h 46mFrontier
Deal found 4/29$189
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/281:00 pmAUS - MLI
1 stop5h 02mAmerican Airlines
Wed 6/45:00 amMLI - AUS
1 stop8h 50mAmerican Airlines
Deal found 4/30$191
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Sat 5/246:00 pmAUS - STL
1 stop4h 27mUnited Airlines
Sun 5/255:20 amSTL - AUS
1 stop6h 08mUnited Airlines
Deal found 4/30$204
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/255:40 amAUS - STL
1 stop6h 24mDelta
Sun 5/255:40 pmSTL - AUS
1 stop6h 40mDelta
Deal found 4/30$209
This Frontier deal was found by Cheapflights users on 4/28. 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 5/1512:55 pmAUS - MDW
1 stop6h 13mFrontier
Mon 5/196:15 amMDW - AUS
1 stop9h 48mFrontier
Deal found 4/28$210
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:45 amAUS - MDW
1 stop5h 08mDelta
Wed 6/46:00 amMDW - AUS
1 stop6h 35mDelta
Deal found 4/29$217

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 May 1, 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

Wed 6/18

6:01 am-8:50 am

Nonstop2h 49m

Chicago O'Hare Intl

Sat 6/21

9:10 pm-11:54 pm

Nonstop2h 44m

$169

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Mon 5/12

8:11 pm-5:25 am

1 stop9h 14m

Chicago O'Hare Intl

Wed 6/11

6:59 pm-1:24 pm

1 stop18h 25m

$173

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Fri 5/30

8:11 pm-5:25 am

1 stop9h 14m

Chicago O'Hare Intl

Fri 6/6

7:45 am-10:34 am

Nonstop2h 49m

$175

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Wed 5/28

5:16 pm-8:10 pm

Nonstop2h 54m

Chicago O'Hare Intl

Tue 6/3

1:26 pm-4:16 pm

Nonstop2h 50m

$179

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Fri 5/16

1:22 pm-4:09 pm

Nonstop2h 47m

Chicago O'Hare Intl

Thu 6/12

4:12 pm-7:01 pm

Nonstop2h 49m

$188

AustinChicago

AUS - MDW

AUSMDW

Austin Bergstrom

Wed 5/28

4:45 pm-9:55 pm

1 stop5h 10m

Chicago Midway

Tue 6/3

8:45 pm-11:25 pm

Nonstop2h 40m

$189

AustinMoline

AUS - MLI

AUSMLI

Austin Bergstrom

Wed 5/28

1:00 pm-6:02 pm

1 stop5h 02m

Moline Quad-City

Wed 6/4

5:00 am-1:50 pm

1 stop8h 50m

$191

AustinChicago

AUS - ORD

AUSORD

Austin Bergstrom

Wed 5/21

6:40 am-10:45 am

1 stop4h 05m

Chicago O'Hare Intl

Sat 5/24

1:50 pm-4:40 pm

Nonstop2h 50m

$204

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Sat 5/24

6:00 pm-10:27 pm

1 stop4h 27m

Lambert-St Louis

Sun 5/25

5:20 am-11:28 am

1 stop6h 08m

$204

AustinSt. Louis

AUS - STL

AUSSTL

Austin Bergstrom

Sun 5/25

5:40 am-12:04 pm

1 stop6h 24m

Lambert-St Louis

Sun 5/25

5:40 pm-12:20 am

1 stop6h 40m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 60 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 May 1, 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 May 1, 2025.

The most flights from AUS to USIL are scheduled on a Wednesday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 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 May 1, 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
9,972 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Allegiant Air
7.3
Good
734 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $87 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $89 and Southwest from $90 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 (93%) or Emirates (93%) 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 $969, our data indicates the cheapest price to be $91. The most popular route (Austin Bergstrom - Chicago O'Hare Intl), is priced around $113.

  • 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$40Average$205FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$161Average$353FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$181Average$409FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$186Average$290FlexibilityNo cancel feeOn-time65%
DeltaCheapest$195Average$341FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$211Average$399FlexibilityNo cancel feeOn-time69%

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