$152+ Cheap flights from Illinois

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ORD — SYD
25 Dec — 1 Jan1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Illinois

Discover essential information about flights departing from Illinois, including flight schedules, destinations, airlines operating at the Illinois airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 25 November 2025.

Good round-trip deal

$548 or less

Good one-way deal

$105 or less
Price to beat on a round-trip flight from Illinois.
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Price to beat on a one-way flight from Illinois.
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Find flights from Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Illinois
Explore the most affordable flight options available from Illinois. Find the lowest fares based on data from user searches, with prices last updated on 25 November 2025.

Wed 21/114:15ORD - SYD
1 stop25h 45mQantas Airways
Tue 3/207:05SYD - ORD
2 stops26h 44mQantas Airways
Deal found 24/11$1,390
Thu 22/109:02ORD - SYD
1 stop29h 23mQantas Airways
Sun 1/207:05SYD - ORD
2 stops26h 44mQantas Airways
Deal found 23/11$1,400
Mon 19/118:40ORD - SYD
1 stop21h 20mQantas Airways
Thu 29/107:05SYD - ORD
2 stops24h 52mQantas Airways
Deal found 22/11$1,406
Tue 27/112:50ORD - BNE
2 stops27h 55mAir Canada
Wed 4/210:45BNE - ORD
2 stops25h 25mAir Canada
Deal found 23/11$1,466
Tue 10/218:40ORD - SYD
1 stop21h 20mQantas Airways
Tue 3/307:05SYD - ORD
2 stops27h 31mQantas Airways
Deal found 23/11$1,469
Mon 22/1215:13ORD - SYD
1 stop24h 47mQantas Airways
Fri 16/107:05SYD - ORD
2 stops26h 44mQantas Airways
Deal found 21/11$1,471
Tue 10/213:05ORD - SYD
1 stop27h 30mAir Canada
Tue 3/311:20SYD - ORD
1 stop20h 21mAir Canada
Deal found 24/11$1,472
Tue 10/208:45ORD - BNE
2 stops32h 00mAir Canada
Sun 22/210:45BNE - ORD
1 stop19h 56mAir Canada
Deal found 24/11$1,472
Wed 20/508:40ORD - SYD
3 stops31h 40mAir Canada
Mon 25/509:20SYD - ORD
1 stop20h 29mAir Canada
Deal found 21/11$1,483
Sun 8/307:15ORD - SYD
3 stops33h 20mAir Canada
Sun 15/310:20SYD - ORD
2 stops25h 25mAir Canada
Deal found 21/11$1,492
Wed 1/408:46ORD - SYD
1 stop31h 34mAir Canada
Wed 22/407:00SYD - ORD
2 stops22h 43mAir Canada
Deal found 22/11$1,494
Wed 25/310:35ORD - SYD
2 stops30h 00mAir Canada
Mon 6/407:00SYD - ORD
2 stops22h 43mAir Canada
Deal found 21/11$1,496

Find flights from Illinois within your budget

 
Find flights departing from Illinois that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 25 November 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 27/1

12:50-08:45

2 stops27h 55m

Brisbane

Wed 4/2

10:45-08:05

2 stops37h 20m

$1,471

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 7/3

12:50-08:45

2 stops27h 55m

Brisbane

Mon 16/3

09:45-17:10

2 stops46h 25m

$1,539

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Mon 23/2

13:05-08:45

1 stop27h 40m

Brisbane

Fri 27/2

10:45-14:41

1 stop19h 56m

$1,539

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Thu 2/4

18:01-07:05

2 stops46h 04m

Brisbane

Sun 12/4

10:00-19:50

2 stops24h 50m

$1,540

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

13:30-07:20

3 stops50h 50m

Sydney Kingsford Smith

Mon 18/5

09:20-15:16

2 stops44h 56m

$1,592

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 6/2

15:35-13:55

2 stops29h 50m

Adelaide

Sat 21/2

19:40-19:30

3 stops40h 20m

$1,607

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 15/2

15:35-08:45

1 stop25h 10m

Brisbane

Wed 4/3

10:45-14:55

2 stops44h 10m

$1,612

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Mon 2/2

07:04-10:25

2 stops34h 21m

Melbourne

Sat 14/2

16:05-19:19

1 stop20h 14m

$1,647

ChicagoMelbourne

ORD - AVV

ORDAVV

Chicago O'Hare Intl

Wed 11/3

15:35-15:50

2 stops32h 15m

Melbourne Avalon

Fri 20/3

06:00-14:41

2 stops24h 41m

$1,663

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Fri 27/2

15:35-16:20

2 stops32h 15m

Adelaide

Tue 3/3

06:10-14:41

2 stops25h 01m

$1,751

Flights are sorted by cheapest return flights first.

Deals found on 24/11

Showing 1-10 of 60 results
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Best time to book a flight from Illinois

Have a flexible travel schedule? Discover the best time to fly from Illinois with our price prediction graph.
Estimated return 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.

Travel insights for flights from Illinois

Get recent, data-driven insights about flights from Illinois including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Illinois (average of $307). Flying from Illinois in January will prove the most costly (average of $1,316). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Illinois?

When flying from Illinois check dates and pricing for the following: Qantas Airways, American Airlines. As they depart for the following popular destinations: Sydney.

Qantas Airways
Qantas Airways
From $1,247
Spirit Airlines
Spirit Airlines
From $90
United Airlines
United Airlines
From $333
American Airlines
American Airlines
From $1,326

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Raleigh-Durham, with prices starting at $101. Explore other affordable destinations below.

Raleigh-Durham
Raleigh-Durham
From $101
Toronto
Toronto
From $105
Los Angeles
Los Angeles
From $121
Memphis
Memphis
From $180

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Direct flights from USA

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Direct flights from Moline

Related info for your journey

Access useful and relevant information related to your journey from Illinois. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 25 November 2025.

  • What is the cheapest month to fly from Illinois?

    Currently, the cheapest month for flights from Illinois is August. The most expensive month for flights is January. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • Where are the cheapest places to fly to from Illinois?

    View the cheapest flight destinations from Illinois:
    Fly from Chicago to Melbourne from $1,318 round trip
    Fly from Chicago to Sydney from $1,386 round trip

  • How does Cheapflights help users find flights from Illinois?

    Deals for flights from Illinois are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

  • Why should you use Cheapflights to find cheap flight tickets from Illinois?

    Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois for you. Better yet — we are completely free to use.

  • Can Cheapflights find flights from Illinois with no change fees?

    Users can book flights with no change fees policies with our dedicated filters. Book flights from Illinois flexibly with Cheapflights today.

  • Can Cheapflights notify me if prices for flights from Illinois become cheaper?

    Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois?

Deals for flights from Illinois are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Illinois become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

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